Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * NET An implementation of the SOCKET network access protocol. | |
3 | * | |
4 | * Version: @(#)socket.c 1.1.93 18/02/95 | |
5 | * | |
6 | * Authors: Orest Zborowski, <obz@Kodak.COM> | |
02c30a84 | 7 | * Ross Biro |
1da177e4 LT |
8 | * Fred N. van Kempen, <waltje@uWalt.NL.Mugnet.ORG> |
9 | * | |
10 | * Fixes: | |
11 | * Anonymous : NOTSOCK/BADF cleanup. Error fix in | |
12 | * shutdown() | |
13 | * Alan Cox : verify_area() fixes | |
14 | * Alan Cox : Removed DDI | |
15 | * Jonathan Kamens : SOCK_DGRAM reconnect bug | |
16 | * Alan Cox : Moved a load of checks to the very | |
17 | * top level. | |
18 | * Alan Cox : Move address structures to/from user | |
19 | * mode above the protocol layers. | |
20 | * Rob Janssen : Allow 0 length sends. | |
21 | * Alan Cox : Asynchronous I/O support (cribbed from the | |
22 | * tty drivers). | |
23 | * Niibe Yutaka : Asynchronous I/O for writes (4.4BSD style) | |
24 | * Jeff Uphoff : Made max number of sockets command-line | |
25 | * configurable. | |
26 | * Matti Aarnio : Made the number of sockets dynamic, | |
27 | * to be allocated when needed, and mr. | |
28 | * Uphoff's max is used as max to be | |
29 | * allowed to allocate. | |
30 | * Linus : Argh. removed all the socket allocation | |
31 | * altogether: it's in the inode now. | |
32 | * Alan Cox : Made sock_alloc()/sock_release() public | |
33 | * for NetROM and future kernel nfsd type | |
34 | * stuff. | |
35 | * Alan Cox : sendmsg/recvmsg basics. | |
36 | * Tom Dyas : Export net symbols. | |
37 | * Marcin Dalecki : Fixed problems with CONFIG_NET="n". | |
38 | * Alan Cox : Added thread locking to sys_* calls | |
39 | * for sockets. May have errors at the | |
40 | * moment. | |
41 | * Kevin Buhr : Fixed the dumb errors in the above. | |
42 | * Andi Kleen : Some small cleanups, optimizations, | |
43 | * and fixed a copy_from_user() bug. | |
44 | * Tigran Aivazian : sys_send(args) calls sys_sendto(args, NULL, 0) | |
89bddce5 | 45 | * Tigran Aivazian : Made listen(2) backlog sanity checks |
1da177e4 LT |
46 | * protocol-independent |
47 | * | |
48 | * | |
49 | * This program is free software; you can redistribute it and/or | |
50 | * modify it under the terms of the GNU General Public License | |
51 | * as published by the Free Software Foundation; either version | |
52 | * 2 of the License, or (at your option) any later version. | |
53 | * | |
54 | * | |
55 | * This module is effectively the top level interface to the BSD socket | |
89bddce5 | 56 | * paradigm. |
1da177e4 LT |
57 | * |
58 | * Based upon Swansea University Computer Society NET3.039 | |
59 | */ | |
60 | ||
1da177e4 | 61 | #include <linux/mm.h> |
1da177e4 LT |
62 | #include <linux/socket.h> |
63 | #include <linux/file.h> | |
64 | #include <linux/net.h> | |
65 | #include <linux/interrupt.h> | |
aaca0bdc | 66 | #include <linux/thread_info.h> |
55737fda | 67 | #include <linux/rcupdate.h> |
1da177e4 LT |
68 | #include <linux/netdevice.h> |
69 | #include <linux/proc_fs.h> | |
70 | #include <linux/seq_file.h> | |
4a3e2f71 | 71 | #include <linux/mutex.h> |
1da177e4 LT |
72 | #include <linux/wanrouter.h> |
73 | #include <linux/if_bridge.h> | |
20380731 ACM |
74 | #include <linux/if_frad.h> |
75 | #include <linux/if_vlan.h> | |
1da177e4 LT |
76 | #include <linux/init.h> |
77 | #include <linux/poll.h> | |
78 | #include <linux/cache.h> | |
79 | #include <linux/module.h> | |
80 | #include <linux/highmem.h> | |
1da177e4 LT |
81 | #include <linux/mount.h> |
82 | #include <linux/security.h> | |
83 | #include <linux/syscalls.h> | |
84 | #include <linux/compat.h> | |
85 | #include <linux/kmod.h> | |
3ec3b2fb | 86 | #include <linux/audit.h> |
d86b5e0e | 87 | #include <linux/wireless.h> |
1b8d7ae4 | 88 | #include <linux/nsproxy.h> |
1fd7317d | 89 | #include <linux/magic.h> |
5a0e3ad6 | 90 | #include <linux/slab.h> |
1da177e4 LT |
91 | |
92 | #include <asm/uaccess.h> | |
93 | #include <asm/unistd.h> | |
94 | ||
95 | #include <net/compat.h> | |
87de87d5 | 96 | #include <net/wext.h> |
f8451725 | 97 | #include <net/cls_cgroup.h> |
1da177e4 LT |
98 | |
99 | #include <net/sock.h> | |
100 | #include <linux/netfilter.h> | |
101 | ||
6b96018b AB |
102 | #include <linux/if_tun.h> |
103 | #include <linux/ipv6_route.h> | |
104 | #include <linux/route.h> | |
6b96018b AB |
105 | #include <linux/sockios.h> |
106 | #include <linux/atalk.h> | |
107 | ||
1da177e4 | 108 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare); |
027445c3 BP |
109 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
110 | unsigned long nr_segs, loff_t pos); | |
111 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, | |
112 | unsigned long nr_segs, loff_t pos); | |
89bddce5 | 113 | static int sock_mmap(struct file *file, struct vm_area_struct *vma); |
1da177e4 LT |
114 | |
115 | static int sock_close(struct inode *inode, struct file *file); | |
116 | static unsigned int sock_poll(struct file *file, | |
117 | struct poll_table_struct *wait); | |
89bddce5 | 118 | static long sock_ioctl(struct file *file, unsigned int cmd, unsigned long arg); |
89bbfc95 SP |
119 | #ifdef CONFIG_COMPAT |
120 | static long compat_sock_ioctl(struct file *file, | |
89bddce5 | 121 | unsigned int cmd, unsigned long arg); |
89bbfc95 | 122 | #endif |
1da177e4 | 123 | static int sock_fasync(int fd, struct file *filp, int on); |
1da177e4 LT |
124 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
125 | int offset, size_t size, loff_t *ppos, int more); | |
9c55e01c | 126 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 127 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c | 128 | unsigned int flags); |
1da177e4 | 129 | |
1da177e4 LT |
130 | /* |
131 | * Socket files have a set of 'special' operations as well as the generic file ones. These don't appear | |
132 | * in the operation structures but are done directly via the socketcall() multiplexor. | |
133 | */ | |
134 | ||
da7071d7 | 135 | static const struct file_operations socket_file_ops = { |
1da177e4 LT |
136 | .owner = THIS_MODULE, |
137 | .llseek = no_llseek, | |
138 | .aio_read = sock_aio_read, | |
139 | .aio_write = sock_aio_write, | |
140 | .poll = sock_poll, | |
141 | .unlocked_ioctl = sock_ioctl, | |
89bbfc95 SP |
142 | #ifdef CONFIG_COMPAT |
143 | .compat_ioctl = compat_sock_ioctl, | |
144 | #endif | |
1da177e4 LT |
145 | .mmap = sock_mmap, |
146 | .open = sock_no_open, /* special open code to disallow open via /proc */ | |
147 | .release = sock_close, | |
148 | .fasync = sock_fasync, | |
5274f052 JA |
149 | .sendpage = sock_sendpage, |
150 | .splice_write = generic_splice_sendpage, | |
9c55e01c | 151 | .splice_read = sock_splice_read, |
1da177e4 LT |
152 | }; |
153 | ||
154 | /* | |
155 | * The protocol list. Each protocol is registered in here. | |
156 | */ | |
157 | ||
1da177e4 | 158 | static DEFINE_SPINLOCK(net_family_lock); |
190683a9 | 159 | static const struct net_proto_family __rcu *net_families[NPROTO] __read_mostly; |
1da177e4 | 160 | |
1da177e4 LT |
161 | /* |
162 | * Statistics counters of the socket lists | |
163 | */ | |
164 | ||
c6d409cf | 165 | static DEFINE_PER_CPU(int, sockets_in_use); |
1da177e4 LT |
166 | |
167 | /* | |
89bddce5 SH |
168 | * Support routines. |
169 | * Move socket addresses back and forth across the kernel/user | |
170 | * divide and look after the messy bits. | |
1da177e4 LT |
171 | */ |
172 | ||
1da177e4 LT |
173 | /** |
174 | * move_addr_to_kernel - copy a socket address into kernel space | |
175 | * @uaddr: Address in user space | |
176 | * @kaddr: Address in kernel space | |
177 | * @ulen: Length in user space | |
178 | * | |
179 | * The address is copied into kernel space. If the provided address is | |
180 | * too long an error code of -EINVAL is returned. If the copy gives | |
181 | * invalid addresses -EFAULT is returned. On a success 0 is returned. | |
182 | */ | |
183 | ||
230b1839 | 184 | int move_addr_to_kernel(void __user *uaddr, int ulen, struct sockaddr *kaddr) |
1da177e4 | 185 | { |
230b1839 | 186 | if (ulen < 0 || ulen > sizeof(struct sockaddr_storage)) |
1da177e4 | 187 | return -EINVAL; |
89bddce5 | 188 | if (ulen == 0) |
1da177e4 | 189 | return 0; |
89bddce5 | 190 | if (copy_from_user(kaddr, uaddr, ulen)) |
1da177e4 | 191 | return -EFAULT; |
3ec3b2fb | 192 | return audit_sockaddr(ulen, kaddr); |
1da177e4 LT |
193 | } |
194 | ||
195 | /** | |
196 | * move_addr_to_user - copy an address to user space | |
197 | * @kaddr: kernel space address | |
198 | * @klen: length of address in kernel | |
199 | * @uaddr: user space address | |
200 | * @ulen: pointer to user length field | |
201 | * | |
202 | * The value pointed to by ulen on entry is the buffer length available. | |
203 | * This is overwritten with the buffer space used. -EINVAL is returned | |
204 | * if an overlong buffer is specified or a negative buffer size. -EFAULT | |
205 | * is returned if either the buffer or the length field are not | |
206 | * accessible. | |
207 | * After copying the data up to the limit the user specifies, the true | |
208 | * length of the data is written over the length limit the user | |
209 | * specified. Zero is returned for a success. | |
210 | */ | |
89bddce5 | 211 | |
11165f14 | 212 | static int move_addr_to_user(struct sockaddr *kaddr, int klen, |
213 | void __user *uaddr, int __user *ulen) | |
1da177e4 LT |
214 | { |
215 | int err; | |
216 | int len; | |
217 | ||
89bddce5 SH |
218 | err = get_user(len, ulen); |
219 | if (err) | |
1da177e4 | 220 | return err; |
89bddce5 SH |
221 | if (len > klen) |
222 | len = klen; | |
230b1839 | 223 | if (len < 0 || len > sizeof(struct sockaddr_storage)) |
1da177e4 | 224 | return -EINVAL; |
89bddce5 | 225 | if (len) { |
d6fe3945 SG |
226 | if (audit_sockaddr(klen, kaddr)) |
227 | return -ENOMEM; | |
89bddce5 | 228 | if (copy_to_user(uaddr, kaddr, len)) |
1da177e4 LT |
229 | return -EFAULT; |
230 | } | |
231 | /* | |
89bddce5 SH |
232 | * "fromlen shall refer to the value before truncation.." |
233 | * 1003.1g | |
1da177e4 LT |
234 | */ |
235 | return __put_user(klen, ulen); | |
236 | } | |
237 | ||
e18b890b | 238 | static struct kmem_cache *sock_inode_cachep __read_mostly; |
1da177e4 LT |
239 | |
240 | static struct inode *sock_alloc_inode(struct super_block *sb) | |
241 | { | |
242 | struct socket_alloc *ei; | |
eaefd110 | 243 | struct socket_wq *wq; |
89bddce5 | 244 | |
e94b1766 | 245 | ei = kmem_cache_alloc(sock_inode_cachep, GFP_KERNEL); |
1da177e4 LT |
246 | if (!ei) |
247 | return NULL; | |
eaefd110 ED |
248 | wq = kmalloc(sizeof(*wq), GFP_KERNEL); |
249 | if (!wq) { | |
43815482 ED |
250 | kmem_cache_free(sock_inode_cachep, ei); |
251 | return NULL; | |
252 | } | |
eaefd110 ED |
253 | init_waitqueue_head(&wq->wait); |
254 | wq->fasync_list = NULL; | |
255 | RCU_INIT_POINTER(ei->socket.wq, wq); | |
89bddce5 | 256 | |
1da177e4 LT |
257 | ei->socket.state = SS_UNCONNECTED; |
258 | ei->socket.flags = 0; | |
259 | ei->socket.ops = NULL; | |
260 | ei->socket.sk = NULL; | |
261 | ei->socket.file = NULL; | |
1da177e4 LT |
262 | |
263 | return &ei->vfs_inode; | |
264 | } | |
265 | ||
43815482 | 266 | |
ff0c7d15 | 267 | |
43815482 ED |
268 | static void wq_free_rcu(struct rcu_head *head) |
269 | { | |
270 | struct socket_wq *wq = container_of(head, struct socket_wq, rcu); | |
271 | ||
272 | kfree(wq); | |
273 | } | |
274 | ||
1da177e4 LT |
275 | static void sock_destroy_inode(struct inode *inode) |
276 | { | |
43815482 | 277 | struct socket_alloc *ei; |
eaefd110 | 278 | struct socket_wq *wq; |
43815482 ED |
279 | |
280 | ei = container_of(inode, struct socket_alloc, vfs_inode); | |
eaefd110 ED |
281 | wq = rcu_dereference_protected(ei->socket.wq, 1); |
282 | call_rcu(&wq->rcu, wq_free_rcu); | |
43815482 | 283 | kmem_cache_free(sock_inode_cachep, ei); |
1da177e4 LT |
284 | } |
285 | ||
51cc5068 | 286 | static void init_once(void *foo) |
1da177e4 | 287 | { |
89bddce5 | 288 | struct socket_alloc *ei = (struct socket_alloc *)foo; |
1da177e4 | 289 | |
a35afb83 | 290 | inode_init_once(&ei->vfs_inode); |
1da177e4 | 291 | } |
89bddce5 | 292 | |
1da177e4 LT |
293 | static int init_inodecache(void) |
294 | { | |
295 | sock_inode_cachep = kmem_cache_create("sock_inode_cache", | |
89bddce5 SH |
296 | sizeof(struct socket_alloc), |
297 | 0, | |
298 | (SLAB_HWCACHE_ALIGN | | |
299 | SLAB_RECLAIM_ACCOUNT | | |
300 | SLAB_MEM_SPREAD), | |
20c2df83 | 301 | init_once); |
1da177e4 LT |
302 | if (sock_inode_cachep == NULL) |
303 | return -ENOMEM; | |
304 | return 0; | |
305 | } | |
306 | ||
b87221de | 307 | static const struct super_operations sockfs_ops = { |
c6d409cf ED |
308 | .alloc_inode = sock_alloc_inode, |
309 | .destroy_inode = sock_destroy_inode, | |
310 | .statfs = simple_statfs, | |
1da177e4 LT |
311 | }; |
312 | ||
c23fbb6b ED |
313 | /* |
314 | * sockfs_dname() is called from d_path(). | |
315 | */ | |
316 | static char *sockfs_dname(struct dentry *dentry, char *buffer, int buflen) | |
317 | { | |
318 | return dynamic_dname(dentry, buffer, buflen, "socket:[%lu]", | |
319 | dentry->d_inode->i_ino); | |
320 | } | |
321 | ||
3ba13d17 | 322 | static const struct dentry_operations sockfs_dentry_operations = { |
c23fbb6b | 323 | .d_dname = sockfs_dname, |
1da177e4 LT |
324 | }; |
325 | ||
c74a1cbb AV |
326 | static struct dentry *sockfs_mount(struct file_system_type *fs_type, |
327 | int flags, const char *dev_name, void *data) | |
328 | { | |
329 | return mount_pseudo(fs_type, "socket:", &sockfs_ops, | |
330 | &sockfs_dentry_operations, SOCKFS_MAGIC); | |
331 | } | |
332 | ||
333 | static struct vfsmount *sock_mnt __read_mostly; | |
334 | ||
335 | static struct file_system_type sock_fs_type = { | |
336 | .name = "sockfs", | |
337 | .mount = sockfs_mount, | |
338 | .kill_sb = kill_anon_super, | |
339 | }; | |
340 | ||
1da177e4 LT |
341 | /* |
342 | * Obtains the first available file descriptor and sets it up for use. | |
343 | * | |
39d8c1b6 DM |
344 | * These functions create file structures and maps them to fd space |
345 | * of the current process. On success it returns file descriptor | |
1da177e4 LT |
346 | * and file struct implicitly stored in sock->file. |
347 | * Note that another thread may close file descriptor before we return | |
348 | * from this function. We use the fact that now we do not refer | |
349 | * to socket after mapping. If one day we will need it, this | |
350 | * function will increment ref. count on file by 1. | |
351 | * | |
352 | * In any case returned fd MAY BE not valid! | |
353 | * This race condition is unavoidable | |
354 | * with shared fd spaces, we cannot solve it inside kernel, | |
355 | * but we take care of internal coherence yet. | |
356 | */ | |
357 | ||
7cbe66b6 | 358 | static int sock_alloc_file(struct socket *sock, struct file **f, int flags) |
1da177e4 | 359 | { |
7cbe66b6 | 360 | struct qstr name = { .name = "" }; |
2c48b9c4 | 361 | struct path path; |
7cbe66b6 | 362 | struct file *file; |
1da177e4 | 363 | int fd; |
1da177e4 | 364 | |
a677a039 | 365 | fd = get_unused_fd_flags(flags); |
7cbe66b6 AV |
366 | if (unlikely(fd < 0)) |
367 | return fd; | |
1da177e4 | 368 | |
4b936885 | 369 | path.dentry = d_alloc_pseudo(sock_mnt->mnt_sb, &name); |
2c48b9c4 | 370 | if (unlikely(!path.dentry)) { |
7cbe66b6 | 371 | put_unused_fd(fd); |
39d8c1b6 | 372 | return -ENOMEM; |
7cbe66b6 | 373 | } |
2c48b9c4 | 374 | path.mnt = mntget(sock_mnt); |
39d8c1b6 | 375 | |
2c48b9c4 | 376 | d_instantiate(path.dentry, SOCK_INODE(sock)); |
cc3808f8 | 377 | SOCK_INODE(sock)->i_fop = &socket_file_ops; |
39d8c1b6 | 378 | |
2c48b9c4 | 379 | file = alloc_file(&path, FMODE_READ | FMODE_WRITE, |
ce8d2cdf | 380 | &socket_file_ops); |
cc3808f8 AV |
381 | if (unlikely(!file)) { |
382 | /* drop dentry, keep inode */ | |
7de9c6ee | 383 | ihold(path.dentry->d_inode); |
2c48b9c4 | 384 | path_put(&path); |
cc3808f8 AV |
385 | put_unused_fd(fd); |
386 | return -ENFILE; | |
387 | } | |
388 | ||
389 | sock->file = file; | |
77d27200 | 390 | file->f_flags = O_RDWR | (flags & O_NONBLOCK); |
39d8c1b6 DM |
391 | file->f_pos = 0; |
392 | file->private_data = sock; | |
1da177e4 | 393 | |
7cbe66b6 AV |
394 | *f = file; |
395 | return fd; | |
39d8c1b6 DM |
396 | } |
397 | ||
a677a039 | 398 | int sock_map_fd(struct socket *sock, int flags) |
39d8c1b6 DM |
399 | { |
400 | struct file *newfile; | |
7cbe66b6 | 401 | int fd = sock_alloc_file(sock, &newfile, flags); |
39d8c1b6 | 402 | |
7cbe66b6 | 403 | if (likely(fd >= 0)) |
39d8c1b6 | 404 | fd_install(fd, newfile); |
7cbe66b6 | 405 | |
1da177e4 LT |
406 | return fd; |
407 | } | |
c6d409cf | 408 | EXPORT_SYMBOL(sock_map_fd); |
1da177e4 | 409 | |
6cb153ca BL |
410 | static struct socket *sock_from_file(struct file *file, int *err) |
411 | { | |
6cb153ca BL |
412 | if (file->f_op == &socket_file_ops) |
413 | return file->private_data; /* set in sock_map_fd */ | |
414 | ||
23bb80d2 ED |
415 | *err = -ENOTSOCK; |
416 | return NULL; | |
6cb153ca BL |
417 | } |
418 | ||
1da177e4 | 419 | /** |
c6d409cf | 420 | * sockfd_lookup - Go from a file number to its socket slot |
1da177e4 LT |
421 | * @fd: file handle |
422 | * @err: pointer to an error code return | |
423 | * | |
424 | * The file handle passed in is locked and the socket it is bound | |
425 | * too is returned. If an error occurs the err pointer is overwritten | |
426 | * with a negative errno code and NULL is returned. The function checks | |
427 | * for both invalid handles and passing a handle which is not a socket. | |
428 | * | |
429 | * On a success the socket object pointer is returned. | |
430 | */ | |
431 | ||
432 | struct socket *sockfd_lookup(int fd, int *err) | |
433 | { | |
434 | struct file *file; | |
1da177e4 LT |
435 | struct socket *sock; |
436 | ||
89bddce5 SH |
437 | file = fget(fd); |
438 | if (!file) { | |
1da177e4 LT |
439 | *err = -EBADF; |
440 | return NULL; | |
441 | } | |
89bddce5 | 442 | |
6cb153ca BL |
443 | sock = sock_from_file(file, err); |
444 | if (!sock) | |
1da177e4 | 445 | fput(file); |
6cb153ca BL |
446 | return sock; |
447 | } | |
c6d409cf | 448 | EXPORT_SYMBOL(sockfd_lookup); |
1da177e4 | 449 | |
6cb153ca BL |
450 | static struct socket *sockfd_lookup_light(int fd, int *err, int *fput_needed) |
451 | { | |
452 | struct file *file; | |
453 | struct socket *sock; | |
454 | ||
3672558c | 455 | *err = -EBADF; |
6cb153ca BL |
456 | file = fget_light(fd, fput_needed); |
457 | if (file) { | |
458 | sock = sock_from_file(file, err); | |
459 | if (sock) | |
460 | return sock; | |
461 | fput_light(file, *fput_needed); | |
1da177e4 | 462 | } |
6cb153ca | 463 | return NULL; |
1da177e4 LT |
464 | } |
465 | ||
466 | /** | |
467 | * sock_alloc - allocate a socket | |
89bddce5 | 468 | * |
1da177e4 LT |
469 | * Allocate a new inode and socket object. The two are bound together |
470 | * and initialised. The socket is then returned. If we are out of inodes | |
471 | * NULL is returned. | |
472 | */ | |
473 | ||
474 | static struct socket *sock_alloc(void) | |
475 | { | |
89bddce5 SH |
476 | struct inode *inode; |
477 | struct socket *sock; | |
1da177e4 LT |
478 | |
479 | inode = new_inode(sock_mnt->mnt_sb); | |
480 | if (!inode) | |
481 | return NULL; | |
482 | ||
483 | sock = SOCKET_I(inode); | |
484 | ||
29a020d3 | 485 | kmemcheck_annotate_bitfield(sock, type); |
85fe4025 | 486 | inode->i_ino = get_next_ino(); |
89bddce5 | 487 | inode->i_mode = S_IFSOCK | S_IRWXUGO; |
8192b0c4 DH |
488 | inode->i_uid = current_fsuid(); |
489 | inode->i_gid = current_fsgid(); | |
1da177e4 | 490 | |
4e69489a | 491 | percpu_add(sockets_in_use, 1); |
1da177e4 LT |
492 | return sock; |
493 | } | |
494 | ||
495 | /* | |
496 | * In theory you can't get an open on this inode, but /proc provides | |
497 | * a back door. Remember to keep it shut otherwise you'll let the | |
498 | * creepy crawlies in. | |
499 | */ | |
89bddce5 | 500 | |
1da177e4 LT |
501 | static int sock_no_open(struct inode *irrelevant, struct file *dontcare) |
502 | { | |
503 | return -ENXIO; | |
504 | } | |
505 | ||
4b6f5d20 | 506 | const struct file_operations bad_sock_fops = { |
1da177e4 LT |
507 | .owner = THIS_MODULE, |
508 | .open = sock_no_open, | |
6038f373 | 509 | .llseek = noop_llseek, |
1da177e4 LT |
510 | }; |
511 | ||
512 | /** | |
513 | * sock_release - close a socket | |
514 | * @sock: socket to close | |
515 | * | |
516 | * The socket is released from the protocol stack if it has a release | |
517 | * callback, and the inode is then released if the socket is bound to | |
89bddce5 | 518 | * an inode not a file. |
1da177e4 | 519 | */ |
89bddce5 | 520 | |
1da177e4 LT |
521 | void sock_release(struct socket *sock) |
522 | { | |
523 | if (sock->ops) { | |
524 | struct module *owner = sock->ops->owner; | |
525 | ||
526 | sock->ops->release(sock); | |
527 | sock->ops = NULL; | |
528 | module_put(owner); | |
529 | } | |
530 | ||
eaefd110 | 531 | if (rcu_dereference_protected(sock->wq, 1)->fasync_list) |
1da177e4 LT |
532 | printk(KERN_ERR "sock_release: fasync list not empty!\n"); |
533 | ||
4e69489a | 534 | percpu_sub(sockets_in_use, 1); |
1da177e4 LT |
535 | if (!sock->file) { |
536 | iput(SOCK_INODE(sock)); | |
537 | return; | |
538 | } | |
89bddce5 | 539 | sock->file = NULL; |
1da177e4 | 540 | } |
c6d409cf | 541 | EXPORT_SYMBOL(sock_release); |
1da177e4 | 542 | |
2244d07b | 543 | int sock_tx_timestamp(struct sock *sk, __u8 *tx_flags) |
20d49473 | 544 | { |
2244d07b | 545 | *tx_flags = 0; |
20d49473 | 546 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_HARDWARE)) |
2244d07b | 547 | *tx_flags |= SKBTX_HW_TSTAMP; |
20d49473 | 548 | if (sock_flag(sk, SOCK_TIMESTAMPING_TX_SOFTWARE)) |
2244d07b | 549 | *tx_flags |= SKBTX_SW_TSTAMP; |
20d49473 PO |
550 | return 0; |
551 | } | |
552 | EXPORT_SYMBOL(sock_tx_timestamp); | |
553 | ||
89bddce5 | 554 | static inline int __sock_sendmsg(struct kiocb *iocb, struct socket *sock, |
1da177e4 LT |
555 | struct msghdr *msg, size_t size) |
556 | { | |
557 | struct sock_iocb *si = kiocb_to_siocb(iocb); | |
558 | int err; | |
559 | ||
f8451725 HX |
560 | sock_update_classid(sock->sk); |
561 | ||
1da177e4 LT |
562 | si->sock = sock; |
563 | si->scm = NULL; | |
564 | si->msg = msg; | |
565 | si->size = size; | |
566 | ||
567 | err = security_socket_sendmsg(sock, msg, size); | |
568 | if (err) | |
569 | return err; | |
570 | ||
571 | return sock->ops->sendmsg(iocb, sock, msg, size); | |
572 | } | |
573 | ||
574 | int sock_sendmsg(struct socket *sock, struct msghdr *msg, size_t size) | |
575 | { | |
576 | struct kiocb iocb; | |
577 | struct sock_iocb siocb; | |
578 | int ret; | |
579 | ||
580 | init_sync_kiocb(&iocb, NULL); | |
581 | iocb.private = &siocb; | |
582 | ret = __sock_sendmsg(&iocb, sock, msg, size); | |
583 | if (-EIOCBQUEUED == ret) | |
584 | ret = wait_on_sync_kiocb(&iocb); | |
585 | return ret; | |
586 | } | |
c6d409cf | 587 | EXPORT_SYMBOL(sock_sendmsg); |
1da177e4 LT |
588 | |
589 | int kernel_sendmsg(struct socket *sock, struct msghdr *msg, | |
590 | struct kvec *vec, size_t num, size_t size) | |
591 | { | |
592 | mm_segment_t oldfs = get_fs(); | |
593 | int result; | |
594 | ||
595 | set_fs(KERNEL_DS); | |
596 | /* | |
597 | * the following is safe, since for compiler definitions of kvec and | |
598 | * iovec are identical, yielding the same in-core layout and alignment | |
599 | */ | |
89bddce5 | 600 | msg->msg_iov = (struct iovec *)vec; |
1da177e4 LT |
601 | msg->msg_iovlen = num; |
602 | result = sock_sendmsg(sock, msg, size); | |
603 | set_fs(oldfs); | |
604 | return result; | |
605 | } | |
c6d409cf | 606 | EXPORT_SYMBOL(kernel_sendmsg); |
1da177e4 | 607 | |
20d49473 PO |
608 | static int ktime2ts(ktime_t kt, struct timespec *ts) |
609 | { | |
610 | if (kt.tv64) { | |
611 | *ts = ktime_to_timespec(kt); | |
612 | return 1; | |
613 | } else { | |
614 | return 0; | |
615 | } | |
616 | } | |
617 | ||
92f37fd2 ED |
618 | /* |
619 | * called from sock_recv_timestamp() if sock_flag(sk, SOCK_RCVTSTAMP) | |
620 | */ | |
621 | void __sock_recv_timestamp(struct msghdr *msg, struct sock *sk, | |
622 | struct sk_buff *skb) | |
623 | { | |
20d49473 PO |
624 | int need_software_tstamp = sock_flag(sk, SOCK_RCVTSTAMP); |
625 | struct timespec ts[3]; | |
626 | int empty = 1; | |
627 | struct skb_shared_hwtstamps *shhwtstamps = | |
628 | skb_hwtstamps(skb); | |
629 | ||
630 | /* Race occurred between timestamp enabling and packet | |
631 | receiving. Fill in the current time for now. */ | |
632 | if (need_software_tstamp && skb->tstamp.tv64 == 0) | |
633 | __net_timestamp(skb); | |
634 | ||
635 | if (need_software_tstamp) { | |
636 | if (!sock_flag(sk, SOCK_RCVTSTAMPNS)) { | |
637 | struct timeval tv; | |
638 | skb_get_timestamp(skb, &tv); | |
639 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMP, | |
640 | sizeof(tv), &tv); | |
641 | } else { | |
842509b8 | 642 | skb_get_timestampns(skb, &ts[0]); |
20d49473 | 643 | put_cmsg(msg, SOL_SOCKET, SCM_TIMESTAMPNS, |
842509b8 | 644 | sizeof(ts[0]), &ts[0]); |
20d49473 PO |
645 | } |
646 | } | |
647 | ||
648 | ||
649 | memset(ts, 0, sizeof(ts)); | |
650 | if (skb->tstamp.tv64 && | |
651 | sock_flag(sk, SOCK_TIMESTAMPING_SOFTWARE)) { | |
652 | skb_get_timestampns(skb, ts + 0); | |
653 | empty = 0; | |
654 | } | |
655 | if (shhwtstamps) { | |
656 | if (sock_flag(sk, SOCK_TIMESTAMPING_SYS_HARDWARE) && | |
657 | ktime2ts(shhwtstamps->syststamp, ts + 1)) | |
658 | empty = 0; | |
659 | if (sock_flag(sk, SOCK_TIMESTAMPING_RAW_HARDWARE) && | |
660 | ktime2ts(shhwtstamps->hwtstamp, ts + 2)) | |
661 | empty = 0; | |
92f37fd2 | 662 | } |
20d49473 PO |
663 | if (!empty) |
664 | put_cmsg(msg, SOL_SOCKET, | |
665 | SCM_TIMESTAMPING, sizeof(ts), &ts); | |
92f37fd2 | 666 | } |
7c81fd8b ACM |
667 | EXPORT_SYMBOL_GPL(__sock_recv_timestamp); |
668 | ||
11165f14 | 669 | static inline void sock_recv_drops(struct msghdr *msg, struct sock *sk, |
670 | struct sk_buff *skb) | |
3b885787 NH |
671 | { |
672 | if (sock_flag(sk, SOCK_RXQ_OVFL) && skb && skb->dropcount) | |
673 | put_cmsg(msg, SOL_SOCKET, SO_RXQ_OVFL, | |
674 | sizeof(__u32), &skb->dropcount); | |
675 | } | |
676 | ||
767dd033 | 677 | void __sock_recv_ts_and_drops(struct msghdr *msg, struct sock *sk, |
3b885787 NH |
678 | struct sk_buff *skb) |
679 | { | |
680 | sock_recv_timestamp(msg, sk, skb); | |
681 | sock_recv_drops(msg, sk, skb); | |
682 | } | |
767dd033 | 683 | EXPORT_SYMBOL_GPL(__sock_recv_ts_and_drops); |
3b885787 | 684 | |
a2e27255 ACM |
685 | static inline int __sock_recvmsg_nosec(struct kiocb *iocb, struct socket *sock, |
686 | struct msghdr *msg, size_t size, int flags) | |
1da177e4 | 687 | { |
1da177e4 LT |
688 | struct sock_iocb *si = kiocb_to_siocb(iocb); |
689 | ||
f8451725 HX |
690 | sock_update_classid(sock->sk); |
691 | ||
1da177e4 LT |
692 | si->sock = sock; |
693 | si->scm = NULL; | |
694 | si->msg = msg; | |
695 | si->size = size; | |
696 | si->flags = flags; | |
697 | ||
1da177e4 LT |
698 | return sock->ops->recvmsg(iocb, sock, msg, size, flags); |
699 | } | |
700 | ||
a2e27255 ACM |
701 | static inline int __sock_recvmsg(struct kiocb *iocb, struct socket *sock, |
702 | struct msghdr *msg, size_t size, int flags) | |
703 | { | |
704 | int err = security_socket_recvmsg(sock, msg, size, flags); | |
705 | ||
706 | return err ?: __sock_recvmsg_nosec(iocb, sock, msg, size, flags); | |
707 | } | |
708 | ||
89bddce5 | 709 | int sock_recvmsg(struct socket *sock, struct msghdr *msg, |
1da177e4 LT |
710 | size_t size, int flags) |
711 | { | |
712 | struct kiocb iocb; | |
713 | struct sock_iocb siocb; | |
714 | int ret; | |
715 | ||
89bddce5 | 716 | init_sync_kiocb(&iocb, NULL); |
1da177e4 LT |
717 | iocb.private = &siocb; |
718 | ret = __sock_recvmsg(&iocb, sock, msg, size, flags); | |
719 | if (-EIOCBQUEUED == ret) | |
720 | ret = wait_on_sync_kiocb(&iocb); | |
721 | return ret; | |
722 | } | |
c6d409cf | 723 | EXPORT_SYMBOL(sock_recvmsg); |
1da177e4 | 724 | |
a2e27255 ACM |
725 | static int sock_recvmsg_nosec(struct socket *sock, struct msghdr *msg, |
726 | size_t size, int flags) | |
727 | { | |
728 | struct kiocb iocb; | |
729 | struct sock_iocb siocb; | |
730 | int ret; | |
731 | ||
732 | init_sync_kiocb(&iocb, NULL); | |
733 | iocb.private = &siocb; | |
734 | ret = __sock_recvmsg_nosec(&iocb, sock, msg, size, flags); | |
735 | if (-EIOCBQUEUED == ret) | |
736 | ret = wait_on_sync_kiocb(&iocb); | |
737 | return ret; | |
738 | } | |
739 | ||
c1249c0a ML |
740 | /** |
741 | * kernel_recvmsg - Receive a message from a socket (kernel space) | |
742 | * @sock: The socket to receive the message from | |
743 | * @msg: Received message | |
744 | * @vec: Input s/g array for message data | |
745 | * @num: Size of input s/g array | |
746 | * @size: Number of bytes to read | |
747 | * @flags: Message flags (MSG_DONTWAIT, etc...) | |
748 | * | |
749 | * On return the msg structure contains the scatter/gather array passed in the | |
750 | * vec argument. The array is modified so that it consists of the unfilled | |
751 | * portion of the original array. | |
752 | * | |
753 | * The returned value is the total number of bytes received, or an error. | |
754 | */ | |
89bddce5 SH |
755 | int kernel_recvmsg(struct socket *sock, struct msghdr *msg, |
756 | struct kvec *vec, size_t num, size_t size, int flags) | |
1da177e4 LT |
757 | { |
758 | mm_segment_t oldfs = get_fs(); | |
759 | int result; | |
760 | ||
761 | set_fs(KERNEL_DS); | |
762 | /* | |
763 | * the following is safe, since for compiler definitions of kvec and | |
764 | * iovec are identical, yielding the same in-core layout and alignment | |
765 | */ | |
89bddce5 | 766 | msg->msg_iov = (struct iovec *)vec, msg->msg_iovlen = num; |
1da177e4 LT |
767 | result = sock_recvmsg(sock, msg, size, flags); |
768 | set_fs(oldfs); | |
769 | return result; | |
770 | } | |
c6d409cf | 771 | EXPORT_SYMBOL(kernel_recvmsg); |
1da177e4 LT |
772 | |
773 | static void sock_aio_dtor(struct kiocb *iocb) | |
774 | { | |
775 | kfree(iocb->private); | |
776 | } | |
777 | ||
ce1d4d3e CH |
778 | static ssize_t sock_sendpage(struct file *file, struct page *page, |
779 | int offset, size_t size, loff_t *ppos, int more) | |
1da177e4 | 780 | { |
1da177e4 LT |
781 | struct socket *sock; |
782 | int flags; | |
783 | ||
ce1d4d3e CH |
784 | sock = file->private_data; |
785 | ||
786 | flags = !(file->f_flags & O_NONBLOCK) ? 0 : MSG_DONTWAIT; | |
787 | if (more) | |
788 | flags |= MSG_MORE; | |
789 | ||
e6949583 | 790 | return kernel_sendpage(sock, page, offset, size, flags); |
ce1d4d3e | 791 | } |
1da177e4 | 792 | |
9c55e01c | 793 | static ssize_t sock_splice_read(struct file *file, loff_t *ppos, |
c6d409cf | 794 | struct pipe_inode_info *pipe, size_t len, |
9c55e01c JA |
795 | unsigned int flags) |
796 | { | |
797 | struct socket *sock = file->private_data; | |
798 | ||
997b37da RDC |
799 | if (unlikely(!sock->ops->splice_read)) |
800 | return -EINVAL; | |
801 | ||
f8451725 HX |
802 | sock_update_classid(sock->sk); |
803 | ||
9c55e01c JA |
804 | return sock->ops->splice_read(sock, ppos, pipe, len, flags); |
805 | } | |
806 | ||
ce1d4d3e | 807 | static struct sock_iocb *alloc_sock_iocb(struct kiocb *iocb, |
89bddce5 | 808 | struct sock_iocb *siocb) |
ce1d4d3e CH |
809 | { |
810 | if (!is_sync_kiocb(iocb)) { | |
811 | siocb = kmalloc(sizeof(*siocb), GFP_KERNEL); | |
812 | if (!siocb) | |
813 | return NULL; | |
1da177e4 LT |
814 | iocb->ki_dtor = sock_aio_dtor; |
815 | } | |
1da177e4 | 816 | |
ce1d4d3e | 817 | siocb->kiocb = iocb; |
ce1d4d3e CH |
818 | iocb->private = siocb; |
819 | return siocb; | |
1da177e4 LT |
820 | } |
821 | ||
ce1d4d3e | 822 | static ssize_t do_sock_read(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
823 | struct file *file, const struct iovec *iov, |
824 | unsigned long nr_segs) | |
ce1d4d3e CH |
825 | { |
826 | struct socket *sock = file->private_data; | |
827 | size_t size = 0; | |
828 | int i; | |
1da177e4 | 829 | |
89bddce5 SH |
830 | for (i = 0; i < nr_segs; i++) |
831 | size += iov[i].iov_len; | |
1da177e4 | 832 | |
ce1d4d3e CH |
833 | msg->msg_name = NULL; |
834 | msg->msg_namelen = 0; | |
835 | msg->msg_control = NULL; | |
836 | msg->msg_controllen = 0; | |
89bddce5 | 837 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
838 | msg->msg_iovlen = nr_segs; |
839 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
840 | ||
841 | return __sock_recvmsg(iocb, sock, msg, size, msg->msg_flags); | |
842 | } | |
843 | ||
027445c3 BP |
844 | static ssize_t sock_aio_read(struct kiocb *iocb, const struct iovec *iov, |
845 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
846 | { |
847 | struct sock_iocb siocb, *x; | |
848 | ||
1da177e4 LT |
849 | if (pos != 0) |
850 | return -ESPIPE; | |
027445c3 BP |
851 | |
852 | if (iocb->ki_left == 0) /* Match SYS5 behaviour */ | |
1da177e4 LT |
853 | return 0; |
854 | ||
027445c3 BP |
855 | |
856 | x = alloc_sock_iocb(iocb, &siocb); | |
ce1d4d3e CH |
857 | if (!x) |
858 | return -ENOMEM; | |
027445c3 | 859 | return do_sock_read(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
860 | } |
861 | ||
ce1d4d3e | 862 | static ssize_t do_sock_write(struct msghdr *msg, struct kiocb *iocb, |
027445c3 BP |
863 | struct file *file, const struct iovec *iov, |
864 | unsigned long nr_segs) | |
1da177e4 | 865 | { |
ce1d4d3e CH |
866 | struct socket *sock = file->private_data; |
867 | size_t size = 0; | |
868 | int i; | |
1da177e4 | 869 | |
89bddce5 SH |
870 | for (i = 0; i < nr_segs; i++) |
871 | size += iov[i].iov_len; | |
1da177e4 | 872 | |
ce1d4d3e CH |
873 | msg->msg_name = NULL; |
874 | msg->msg_namelen = 0; | |
875 | msg->msg_control = NULL; | |
876 | msg->msg_controllen = 0; | |
89bddce5 | 877 | msg->msg_iov = (struct iovec *)iov; |
ce1d4d3e CH |
878 | msg->msg_iovlen = nr_segs; |
879 | msg->msg_flags = (file->f_flags & O_NONBLOCK) ? MSG_DONTWAIT : 0; | |
880 | if (sock->type == SOCK_SEQPACKET) | |
881 | msg->msg_flags |= MSG_EOR; | |
1da177e4 | 882 | |
ce1d4d3e | 883 | return __sock_sendmsg(iocb, sock, msg, size); |
1da177e4 LT |
884 | } |
885 | ||
027445c3 BP |
886 | static ssize_t sock_aio_write(struct kiocb *iocb, const struct iovec *iov, |
887 | unsigned long nr_segs, loff_t pos) | |
ce1d4d3e CH |
888 | { |
889 | struct sock_iocb siocb, *x; | |
1da177e4 | 890 | |
ce1d4d3e CH |
891 | if (pos != 0) |
892 | return -ESPIPE; | |
027445c3 | 893 | |
027445c3 | 894 | x = alloc_sock_iocb(iocb, &siocb); |
ce1d4d3e CH |
895 | if (!x) |
896 | return -ENOMEM; | |
1da177e4 | 897 | |
027445c3 | 898 | return do_sock_write(&x->async_msg, iocb, iocb->ki_filp, iov, nr_segs); |
1da177e4 LT |
899 | } |
900 | ||
1da177e4 LT |
901 | /* |
902 | * Atomic setting of ioctl hooks to avoid race | |
903 | * with module unload. | |
904 | */ | |
905 | ||
4a3e2f71 | 906 | static DEFINE_MUTEX(br_ioctl_mutex); |
c6d409cf | 907 | static int (*br_ioctl_hook) (struct net *, unsigned int cmd, void __user *arg); |
1da177e4 | 908 | |
881d966b | 909 | void brioctl_set(int (*hook) (struct net *, unsigned int, void __user *)) |
1da177e4 | 910 | { |
4a3e2f71 | 911 | mutex_lock(&br_ioctl_mutex); |
1da177e4 | 912 | br_ioctl_hook = hook; |
4a3e2f71 | 913 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
914 | } |
915 | EXPORT_SYMBOL(brioctl_set); | |
916 | ||
4a3e2f71 | 917 | static DEFINE_MUTEX(vlan_ioctl_mutex); |
881d966b | 918 | static int (*vlan_ioctl_hook) (struct net *, void __user *arg); |
1da177e4 | 919 | |
881d966b | 920 | void vlan_ioctl_set(int (*hook) (struct net *, void __user *)) |
1da177e4 | 921 | { |
4a3e2f71 | 922 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 923 | vlan_ioctl_hook = hook; |
4a3e2f71 | 924 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 LT |
925 | } |
926 | EXPORT_SYMBOL(vlan_ioctl_set); | |
927 | ||
4a3e2f71 | 928 | static DEFINE_MUTEX(dlci_ioctl_mutex); |
89bddce5 | 929 | static int (*dlci_ioctl_hook) (unsigned int, void __user *); |
1da177e4 | 930 | |
89bddce5 | 931 | void dlci_ioctl_set(int (*hook) (unsigned int, void __user *)) |
1da177e4 | 932 | { |
4a3e2f71 | 933 | mutex_lock(&dlci_ioctl_mutex); |
1da177e4 | 934 | dlci_ioctl_hook = hook; |
4a3e2f71 | 935 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
936 | } |
937 | EXPORT_SYMBOL(dlci_ioctl_set); | |
938 | ||
6b96018b AB |
939 | static long sock_do_ioctl(struct net *net, struct socket *sock, |
940 | unsigned int cmd, unsigned long arg) | |
941 | { | |
942 | int err; | |
943 | void __user *argp = (void __user *)arg; | |
944 | ||
945 | err = sock->ops->ioctl(sock, cmd, arg); | |
946 | ||
947 | /* | |
948 | * If this ioctl is unknown try to hand it down | |
949 | * to the NIC driver. | |
950 | */ | |
951 | if (err == -ENOIOCTLCMD) | |
952 | err = dev_ioctl(net, cmd, argp); | |
953 | ||
954 | return err; | |
955 | } | |
956 | ||
1da177e4 LT |
957 | /* |
958 | * With an ioctl, arg may well be a user mode pointer, but we don't know | |
959 | * what to do with it - that's up to the protocol still. | |
960 | */ | |
961 | ||
962 | static long sock_ioctl(struct file *file, unsigned cmd, unsigned long arg) | |
963 | { | |
964 | struct socket *sock; | |
881d966b | 965 | struct sock *sk; |
1da177e4 LT |
966 | void __user *argp = (void __user *)arg; |
967 | int pid, err; | |
881d966b | 968 | struct net *net; |
1da177e4 | 969 | |
b69aee04 | 970 | sock = file->private_data; |
881d966b | 971 | sk = sock->sk; |
3b1e0a65 | 972 | net = sock_net(sk); |
1da177e4 | 973 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) { |
881d966b | 974 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 975 | } else |
3d23e349 | 976 | #ifdef CONFIG_WEXT_CORE |
1da177e4 | 977 | if (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST) { |
881d966b | 978 | err = dev_ioctl(net, cmd, argp); |
1da177e4 | 979 | } else |
3d23e349 | 980 | #endif |
89bddce5 | 981 | switch (cmd) { |
1da177e4 LT |
982 | case FIOSETOWN: |
983 | case SIOCSPGRP: | |
984 | err = -EFAULT; | |
985 | if (get_user(pid, (int __user *)argp)) | |
986 | break; | |
987 | err = f_setown(sock->file, pid, 1); | |
988 | break; | |
989 | case FIOGETOWN: | |
990 | case SIOCGPGRP: | |
609d7fa9 | 991 | err = put_user(f_getown(sock->file), |
89bddce5 | 992 | (int __user *)argp); |
1da177e4 LT |
993 | break; |
994 | case SIOCGIFBR: | |
995 | case SIOCSIFBR: | |
996 | case SIOCBRADDBR: | |
997 | case SIOCBRDELBR: | |
998 | err = -ENOPKG; | |
999 | if (!br_ioctl_hook) | |
1000 | request_module("bridge"); | |
1001 | ||
4a3e2f71 | 1002 | mutex_lock(&br_ioctl_mutex); |
89bddce5 | 1003 | if (br_ioctl_hook) |
881d966b | 1004 | err = br_ioctl_hook(net, cmd, argp); |
4a3e2f71 | 1005 | mutex_unlock(&br_ioctl_mutex); |
1da177e4 LT |
1006 | break; |
1007 | case SIOCGIFVLAN: | |
1008 | case SIOCSIFVLAN: | |
1009 | err = -ENOPKG; | |
1010 | if (!vlan_ioctl_hook) | |
1011 | request_module("8021q"); | |
1012 | ||
4a3e2f71 | 1013 | mutex_lock(&vlan_ioctl_mutex); |
1da177e4 | 1014 | if (vlan_ioctl_hook) |
881d966b | 1015 | err = vlan_ioctl_hook(net, argp); |
4a3e2f71 | 1016 | mutex_unlock(&vlan_ioctl_mutex); |
1da177e4 | 1017 | break; |
1da177e4 LT |
1018 | case SIOCADDDLCI: |
1019 | case SIOCDELDLCI: | |
1020 | err = -ENOPKG; | |
1021 | if (!dlci_ioctl_hook) | |
1022 | request_module("dlci"); | |
1023 | ||
7512cbf6 PE |
1024 | mutex_lock(&dlci_ioctl_mutex); |
1025 | if (dlci_ioctl_hook) | |
1da177e4 | 1026 | err = dlci_ioctl_hook(cmd, argp); |
7512cbf6 | 1027 | mutex_unlock(&dlci_ioctl_mutex); |
1da177e4 LT |
1028 | break; |
1029 | default: | |
6b96018b | 1030 | err = sock_do_ioctl(net, sock, cmd, arg); |
1da177e4 | 1031 | break; |
89bddce5 | 1032 | } |
1da177e4 LT |
1033 | return err; |
1034 | } | |
1035 | ||
1036 | int sock_create_lite(int family, int type, int protocol, struct socket **res) | |
1037 | { | |
1038 | int err; | |
1039 | struct socket *sock = NULL; | |
89bddce5 | 1040 | |
1da177e4 LT |
1041 | err = security_socket_create(family, type, protocol, 1); |
1042 | if (err) | |
1043 | goto out; | |
1044 | ||
1045 | sock = sock_alloc(); | |
1046 | if (!sock) { | |
1047 | err = -ENOMEM; | |
1048 | goto out; | |
1049 | } | |
1050 | ||
1da177e4 | 1051 | sock->type = type; |
7420ed23 VY |
1052 | err = security_socket_post_create(sock, family, type, protocol, 1); |
1053 | if (err) | |
1054 | goto out_release; | |
1055 | ||
1da177e4 LT |
1056 | out: |
1057 | *res = sock; | |
1058 | return err; | |
7420ed23 VY |
1059 | out_release: |
1060 | sock_release(sock); | |
1061 | sock = NULL; | |
1062 | goto out; | |
1da177e4 | 1063 | } |
c6d409cf | 1064 | EXPORT_SYMBOL(sock_create_lite); |
1da177e4 LT |
1065 | |
1066 | /* No kernel lock held - perfect */ | |
89bddce5 | 1067 | static unsigned int sock_poll(struct file *file, poll_table *wait) |
1da177e4 LT |
1068 | { |
1069 | struct socket *sock; | |
1070 | ||
1071 | /* | |
89bddce5 | 1072 | * We can't return errors to poll, so it's either yes or no. |
1da177e4 | 1073 | */ |
b69aee04 | 1074 | sock = file->private_data; |
1da177e4 LT |
1075 | return sock->ops->poll(file, sock, wait); |
1076 | } | |
1077 | ||
89bddce5 | 1078 | static int sock_mmap(struct file *file, struct vm_area_struct *vma) |
1da177e4 | 1079 | { |
b69aee04 | 1080 | struct socket *sock = file->private_data; |
1da177e4 LT |
1081 | |
1082 | return sock->ops->mmap(file, sock, vma); | |
1083 | } | |
1084 | ||
20380731 | 1085 | static int sock_close(struct inode *inode, struct file *filp) |
1da177e4 LT |
1086 | { |
1087 | /* | |
89bddce5 SH |
1088 | * It was possible the inode is NULL we were |
1089 | * closing an unfinished socket. | |
1da177e4 LT |
1090 | */ |
1091 | ||
89bddce5 | 1092 | if (!inode) { |
1da177e4 LT |
1093 | printk(KERN_DEBUG "sock_close: NULL inode\n"); |
1094 | return 0; | |
1095 | } | |
1da177e4 LT |
1096 | sock_release(SOCKET_I(inode)); |
1097 | return 0; | |
1098 | } | |
1099 | ||
1100 | /* | |
1101 | * Update the socket async list | |
1102 | * | |
1103 | * Fasync_list locking strategy. | |
1104 | * | |
1105 | * 1. fasync_list is modified only under process context socket lock | |
1106 | * i.e. under semaphore. | |
1107 | * 2. fasync_list is used under read_lock(&sk->sk_callback_lock) | |
989a2979 | 1108 | * or under socket lock |
1da177e4 LT |
1109 | */ |
1110 | ||
1111 | static int sock_fasync(int fd, struct file *filp, int on) | |
1112 | { | |
989a2979 ED |
1113 | struct socket *sock = filp->private_data; |
1114 | struct sock *sk = sock->sk; | |
eaefd110 | 1115 | struct socket_wq *wq; |
1da177e4 | 1116 | |
989a2979 | 1117 | if (sk == NULL) |
1da177e4 | 1118 | return -EINVAL; |
1da177e4 LT |
1119 | |
1120 | lock_sock(sk); | |
eaefd110 ED |
1121 | wq = rcu_dereference_protected(sock->wq, sock_owned_by_user(sk)); |
1122 | fasync_helper(fd, filp, on, &wq->fasync_list); | |
1da177e4 | 1123 | |
eaefd110 | 1124 | if (!wq->fasync_list) |
989a2979 ED |
1125 | sock_reset_flag(sk, SOCK_FASYNC); |
1126 | else | |
bcdce719 | 1127 | sock_set_flag(sk, SOCK_FASYNC); |
1da177e4 | 1128 | |
989a2979 | 1129 | release_sock(sk); |
1da177e4 LT |
1130 | return 0; |
1131 | } | |
1132 | ||
43815482 | 1133 | /* This function may be called only under socket lock or callback_lock or rcu_lock */ |
1da177e4 LT |
1134 | |
1135 | int sock_wake_async(struct socket *sock, int how, int band) | |
1136 | { | |
43815482 ED |
1137 | struct socket_wq *wq; |
1138 | ||
1139 | if (!sock) | |
1140 | return -1; | |
1141 | rcu_read_lock(); | |
1142 | wq = rcu_dereference(sock->wq); | |
1143 | if (!wq || !wq->fasync_list) { | |
1144 | rcu_read_unlock(); | |
1da177e4 | 1145 | return -1; |
43815482 | 1146 | } |
89bddce5 | 1147 | switch (how) { |
8d8ad9d7 | 1148 | case SOCK_WAKE_WAITD: |
1da177e4 LT |
1149 | if (test_bit(SOCK_ASYNC_WAITDATA, &sock->flags)) |
1150 | break; | |
1151 | goto call_kill; | |
8d8ad9d7 | 1152 | case SOCK_WAKE_SPACE: |
1da177e4 LT |
1153 | if (!test_and_clear_bit(SOCK_ASYNC_NOSPACE, &sock->flags)) |
1154 | break; | |
1155 | /* fall through */ | |
8d8ad9d7 | 1156 | case SOCK_WAKE_IO: |
89bddce5 | 1157 | call_kill: |
43815482 | 1158 | kill_fasync(&wq->fasync_list, SIGIO, band); |
1da177e4 | 1159 | break; |
8d8ad9d7 | 1160 | case SOCK_WAKE_URG: |
43815482 | 1161 | kill_fasync(&wq->fasync_list, SIGURG, band); |
1da177e4 | 1162 | } |
43815482 | 1163 | rcu_read_unlock(); |
1da177e4 LT |
1164 | return 0; |
1165 | } | |
c6d409cf | 1166 | EXPORT_SYMBOL(sock_wake_async); |
1da177e4 | 1167 | |
721db93a | 1168 | int __sock_create(struct net *net, int family, int type, int protocol, |
89bddce5 | 1169 | struct socket **res, int kern) |
1da177e4 LT |
1170 | { |
1171 | int err; | |
1172 | struct socket *sock; | |
55737fda | 1173 | const struct net_proto_family *pf; |
1da177e4 LT |
1174 | |
1175 | /* | |
89bddce5 | 1176 | * Check protocol is in range |
1da177e4 LT |
1177 | */ |
1178 | if (family < 0 || family >= NPROTO) | |
1179 | return -EAFNOSUPPORT; | |
1180 | if (type < 0 || type >= SOCK_MAX) | |
1181 | return -EINVAL; | |
1182 | ||
1183 | /* Compatibility. | |
1184 | ||
1185 | This uglymoron is moved from INET layer to here to avoid | |
1186 | deadlock in module load. | |
1187 | */ | |
1188 | if (family == PF_INET && type == SOCK_PACKET) { | |
89bddce5 | 1189 | static int warned; |
1da177e4 LT |
1190 | if (!warned) { |
1191 | warned = 1; | |
89bddce5 SH |
1192 | printk(KERN_INFO "%s uses obsolete (PF_INET,SOCK_PACKET)\n", |
1193 | current->comm); | |
1da177e4 LT |
1194 | } |
1195 | family = PF_PACKET; | |
1196 | } | |
1197 | ||
1198 | err = security_socket_create(family, type, protocol, kern); | |
1199 | if (err) | |
1200 | return err; | |
89bddce5 | 1201 | |
55737fda SH |
1202 | /* |
1203 | * Allocate the socket and allow the family to set things up. if | |
1204 | * the protocol is 0, the family is instructed to select an appropriate | |
1205 | * default. | |
1206 | */ | |
1207 | sock = sock_alloc(); | |
1208 | if (!sock) { | |
1209 | if (net_ratelimit()) | |
1210 | printk(KERN_WARNING "socket: no more sockets\n"); | |
1211 | return -ENFILE; /* Not exactly a match, but its the | |
1212 | closest posix thing */ | |
1213 | } | |
1214 | ||
1215 | sock->type = type; | |
1216 | ||
95a5afca | 1217 | #ifdef CONFIG_MODULES |
89bddce5 SH |
1218 | /* Attempt to load a protocol module if the find failed. |
1219 | * | |
1220 | * 12/09/1996 Marcin: But! this makes REALLY only sense, if the user | |
1da177e4 LT |
1221 | * requested real, full-featured networking support upon configuration. |
1222 | * Otherwise module support will break! | |
1223 | */ | |
190683a9 | 1224 | if (rcu_access_pointer(net_families[family]) == NULL) |
89bddce5 | 1225 | request_module("net-pf-%d", family); |
1da177e4 LT |
1226 | #endif |
1227 | ||
55737fda SH |
1228 | rcu_read_lock(); |
1229 | pf = rcu_dereference(net_families[family]); | |
1230 | err = -EAFNOSUPPORT; | |
1231 | if (!pf) | |
1232 | goto out_release; | |
1da177e4 LT |
1233 | |
1234 | /* | |
1235 | * We will call the ->create function, that possibly is in a loadable | |
1236 | * module, so we have to bump that loadable module refcnt first. | |
1237 | */ | |
55737fda | 1238 | if (!try_module_get(pf->owner)) |
1da177e4 LT |
1239 | goto out_release; |
1240 | ||
55737fda SH |
1241 | /* Now protected by module ref count */ |
1242 | rcu_read_unlock(); | |
1243 | ||
3f378b68 | 1244 | err = pf->create(net, sock, protocol, kern); |
55737fda | 1245 | if (err < 0) |
1da177e4 | 1246 | goto out_module_put; |
a79af59e | 1247 | |
1da177e4 LT |
1248 | /* |
1249 | * Now to bump the refcnt of the [loadable] module that owns this | |
1250 | * socket at sock_release time we decrement its refcnt. | |
1251 | */ | |
55737fda SH |
1252 | if (!try_module_get(sock->ops->owner)) |
1253 | goto out_module_busy; | |
1254 | ||
1da177e4 LT |
1255 | /* |
1256 | * Now that we're done with the ->create function, the [loadable] | |
1257 | * module can have its refcnt decremented | |
1258 | */ | |
55737fda | 1259 | module_put(pf->owner); |
7420ed23 VY |
1260 | err = security_socket_post_create(sock, family, type, protocol, kern); |
1261 | if (err) | |
3b185525 | 1262 | goto out_sock_release; |
55737fda | 1263 | *res = sock; |
1da177e4 | 1264 | |
55737fda SH |
1265 | return 0; |
1266 | ||
1267 | out_module_busy: | |
1268 | err = -EAFNOSUPPORT; | |
1da177e4 | 1269 | out_module_put: |
55737fda SH |
1270 | sock->ops = NULL; |
1271 | module_put(pf->owner); | |
1272 | out_sock_release: | |
1da177e4 | 1273 | sock_release(sock); |
55737fda SH |
1274 | return err; |
1275 | ||
1276 | out_release: | |
1277 | rcu_read_unlock(); | |
1278 | goto out_sock_release; | |
1da177e4 | 1279 | } |
721db93a | 1280 | EXPORT_SYMBOL(__sock_create); |
1da177e4 LT |
1281 | |
1282 | int sock_create(int family, int type, int protocol, struct socket **res) | |
1283 | { | |
1b8d7ae4 | 1284 | return __sock_create(current->nsproxy->net_ns, family, type, protocol, res, 0); |
1da177e4 | 1285 | } |
c6d409cf | 1286 | EXPORT_SYMBOL(sock_create); |
1da177e4 LT |
1287 | |
1288 | int sock_create_kern(int family, int type, int protocol, struct socket **res) | |
1289 | { | |
1b8d7ae4 | 1290 | return __sock_create(&init_net, family, type, protocol, res, 1); |
1da177e4 | 1291 | } |
c6d409cf | 1292 | EXPORT_SYMBOL(sock_create_kern); |
1da177e4 | 1293 | |
3e0fa65f | 1294 | SYSCALL_DEFINE3(socket, int, family, int, type, int, protocol) |
1da177e4 LT |
1295 | { |
1296 | int retval; | |
1297 | struct socket *sock; | |
a677a039 UD |
1298 | int flags; |
1299 | ||
e38b36f3 UD |
1300 | /* Check the SOCK_* constants for consistency. */ |
1301 | BUILD_BUG_ON(SOCK_CLOEXEC != O_CLOEXEC); | |
1302 | BUILD_BUG_ON((SOCK_MAX | SOCK_TYPE_MASK) != SOCK_TYPE_MASK); | |
1303 | BUILD_BUG_ON(SOCK_CLOEXEC & SOCK_TYPE_MASK); | |
1304 | BUILD_BUG_ON(SOCK_NONBLOCK & SOCK_TYPE_MASK); | |
1305 | ||
a677a039 | 1306 | flags = type & ~SOCK_TYPE_MASK; |
77d27200 | 1307 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1308 | return -EINVAL; |
1309 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1310 | |
aaca0bdc UD |
1311 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1312 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1313 | ||
1da177e4 LT |
1314 | retval = sock_create(family, type, protocol, &sock); |
1315 | if (retval < 0) | |
1316 | goto out; | |
1317 | ||
77d27200 | 1318 | retval = sock_map_fd(sock, flags & (O_CLOEXEC | O_NONBLOCK)); |
1da177e4 LT |
1319 | if (retval < 0) |
1320 | goto out_release; | |
1321 | ||
1322 | out: | |
1323 | /* It may be already another descriptor 8) Not kernel problem. */ | |
1324 | return retval; | |
1325 | ||
1326 | out_release: | |
1327 | sock_release(sock); | |
1328 | return retval; | |
1329 | } | |
1330 | ||
1331 | /* | |
1332 | * Create a pair of connected sockets. | |
1333 | */ | |
1334 | ||
3e0fa65f HC |
1335 | SYSCALL_DEFINE4(socketpair, int, family, int, type, int, protocol, |
1336 | int __user *, usockvec) | |
1da177e4 LT |
1337 | { |
1338 | struct socket *sock1, *sock2; | |
1339 | int fd1, fd2, err; | |
db349509 | 1340 | struct file *newfile1, *newfile2; |
a677a039 UD |
1341 | int flags; |
1342 | ||
1343 | flags = type & ~SOCK_TYPE_MASK; | |
77d27200 | 1344 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
a677a039 UD |
1345 | return -EINVAL; |
1346 | type &= SOCK_TYPE_MASK; | |
1da177e4 | 1347 | |
aaca0bdc UD |
1348 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) |
1349 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1350 | ||
1da177e4 LT |
1351 | /* |
1352 | * Obtain the first socket and check if the underlying protocol | |
1353 | * supports the socketpair call. | |
1354 | */ | |
1355 | ||
1356 | err = sock_create(family, type, protocol, &sock1); | |
1357 | if (err < 0) | |
1358 | goto out; | |
1359 | ||
1360 | err = sock_create(family, type, protocol, &sock2); | |
1361 | if (err < 0) | |
1362 | goto out_release_1; | |
1363 | ||
1364 | err = sock1->ops->socketpair(sock1, sock2); | |
89bddce5 | 1365 | if (err < 0) |
1da177e4 LT |
1366 | goto out_release_both; |
1367 | ||
7cbe66b6 | 1368 | fd1 = sock_alloc_file(sock1, &newfile1, flags); |
bf3c23d1 DM |
1369 | if (unlikely(fd1 < 0)) { |
1370 | err = fd1; | |
db349509 | 1371 | goto out_release_both; |
bf3c23d1 | 1372 | } |
1da177e4 | 1373 | |
7cbe66b6 | 1374 | fd2 = sock_alloc_file(sock2, &newfile2, flags); |
198de4d7 AV |
1375 | if (unlikely(fd2 < 0)) { |
1376 | err = fd2; | |
1377 | fput(newfile1); | |
1378 | put_unused_fd(fd1); | |
1379 | sock_release(sock2); | |
1380 | goto out; | |
db349509 AV |
1381 | } |
1382 | ||
157cf649 | 1383 | audit_fd_pair(fd1, fd2); |
db349509 AV |
1384 | fd_install(fd1, newfile1); |
1385 | fd_install(fd2, newfile2); | |
1da177e4 LT |
1386 | /* fd1 and fd2 may be already another descriptors. |
1387 | * Not kernel problem. | |
1388 | */ | |
1389 | ||
89bddce5 | 1390 | err = put_user(fd1, &usockvec[0]); |
1da177e4 LT |
1391 | if (!err) |
1392 | err = put_user(fd2, &usockvec[1]); | |
1393 | if (!err) | |
1394 | return 0; | |
1395 | ||
1396 | sys_close(fd2); | |
1397 | sys_close(fd1); | |
1398 | return err; | |
1399 | ||
1da177e4 | 1400 | out_release_both: |
89bddce5 | 1401 | sock_release(sock2); |
1da177e4 | 1402 | out_release_1: |
89bddce5 | 1403 | sock_release(sock1); |
1da177e4 LT |
1404 | out: |
1405 | return err; | |
1406 | } | |
1407 | ||
1da177e4 LT |
1408 | /* |
1409 | * Bind a name to a socket. Nothing much to do here since it's | |
1410 | * the protocol's responsibility to handle the local address. | |
1411 | * | |
1412 | * We move the socket address to kernel space before we call | |
1413 | * the protocol layer (having also checked the address is ok). | |
1414 | */ | |
1415 | ||
20f37034 | 1416 | SYSCALL_DEFINE3(bind, int, fd, struct sockaddr __user *, umyaddr, int, addrlen) |
1da177e4 LT |
1417 | { |
1418 | struct socket *sock; | |
230b1839 | 1419 | struct sockaddr_storage address; |
6cb153ca | 1420 | int err, fput_needed; |
1da177e4 | 1421 | |
89bddce5 | 1422 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
e71a4783 | 1423 | if (sock) { |
230b1839 | 1424 | err = move_addr_to_kernel(umyaddr, addrlen, (struct sockaddr *)&address); |
89bddce5 SH |
1425 | if (err >= 0) { |
1426 | err = security_socket_bind(sock, | |
230b1839 | 1427 | (struct sockaddr *)&address, |
89bddce5 | 1428 | addrlen); |
6cb153ca BL |
1429 | if (!err) |
1430 | err = sock->ops->bind(sock, | |
89bddce5 | 1431 | (struct sockaddr *) |
230b1839 | 1432 | &address, addrlen); |
1da177e4 | 1433 | } |
6cb153ca | 1434 | fput_light(sock->file, fput_needed); |
89bddce5 | 1435 | } |
1da177e4 LT |
1436 | return err; |
1437 | } | |
1438 | ||
1da177e4 LT |
1439 | /* |
1440 | * Perform a listen. Basically, we allow the protocol to do anything | |
1441 | * necessary for a listen, and if that works, we mark the socket as | |
1442 | * ready for listening. | |
1443 | */ | |
1444 | ||
3e0fa65f | 1445 | SYSCALL_DEFINE2(listen, int, fd, int, backlog) |
1da177e4 LT |
1446 | { |
1447 | struct socket *sock; | |
6cb153ca | 1448 | int err, fput_needed; |
b8e1f9b5 | 1449 | int somaxconn; |
89bddce5 SH |
1450 | |
1451 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1452 | if (sock) { | |
8efa6e93 | 1453 | somaxconn = sock_net(sock->sk)->core.sysctl_somaxconn; |
b8e1f9b5 PE |
1454 | if ((unsigned)backlog > somaxconn) |
1455 | backlog = somaxconn; | |
1da177e4 LT |
1456 | |
1457 | err = security_socket_listen(sock, backlog); | |
6cb153ca BL |
1458 | if (!err) |
1459 | err = sock->ops->listen(sock, backlog); | |
1da177e4 | 1460 | |
6cb153ca | 1461 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1462 | } |
1463 | return err; | |
1464 | } | |
1465 | ||
1da177e4 LT |
1466 | /* |
1467 | * For accept, we attempt to create a new socket, set up the link | |
1468 | * with the client, wake up the client, then return the new | |
1469 | * connected fd. We collect the address of the connector in kernel | |
1470 | * space and move it to user at the very end. This is unclean because | |
1471 | * we open the socket then return an error. | |
1472 | * | |
1473 | * 1003.1g adds the ability to recvmsg() to query connection pending | |
1474 | * status to recvmsg. We need to add that support in a way thats | |
1475 | * clean when we restucture accept also. | |
1476 | */ | |
1477 | ||
20f37034 HC |
1478 | SYSCALL_DEFINE4(accept4, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1479 | int __user *, upeer_addrlen, int, flags) | |
1da177e4 LT |
1480 | { |
1481 | struct socket *sock, *newsock; | |
39d8c1b6 | 1482 | struct file *newfile; |
6cb153ca | 1483 | int err, len, newfd, fput_needed; |
230b1839 | 1484 | struct sockaddr_storage address; |
1da177e4 | 1485 | |
77d27200 | 1486 | if (flags & ~(SOCK_CLOEXEC | SOCK_NONBLOCK)) |
aaca0bdc UD |
1487 | return -EINVAL; |
1488 | ||
1489 | if (SOCK_NONBLOCK != O_NONBLOCK && (flags & SOCK_NONBLOCK)) | |
1490 | flags = (flags & ~SOCK_NONBLOCK) | O_NONBLOCK; | |
1491 | ||
6cb153ca | 1492 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1493 | if (!sock) |
1494 | goto out; | |
1495 | ||
1496 | err = -ENFILE; | |
c6d409cf ED |
1497 | newsock = sock_alloc(); |
1498 | if (!newsock) | |
1da177e4 LT |
1499 | goto out_put; |
1500 | ||
1501 | newsock->type = sock->type; | |
1502 | newsock->ops = sock->ops; | |
1503 | ||
1da177e4 LT |
1504 | /* |
1505 | * We don't need try_module_get here, as the listening socket (sock) | |
1506 | * has the protocol module (sock->ops->owner) held. | |
1507 | */ | |
1508 | __module_get(newsock->ops->owner); | |
1509 | ||
7cbe66b6 | 1510 | newfd = sock_alloc_file(newsock, &newfile, flags); |
39d8c1b6 DM |
1511 | if (unlikely(newfd < 0)) { |
1512 | err = newfd; | |
9a1875e6 DM |
1513 | sock_release(newsock); |
1514 | goto out_put; | |
39d8c1b6 DM |
1515 | } |
1516 | ||
a79af59e FF |
1517 | err = security_socket_accept(sock, newsock); |
1518 | if (err) | |
39d8c1b6 | 1519 | goto out_fd; |
a79af59e | 1520 | |
1da177e4 LT |
1521 | err = sock->ops->accept(sock, newsock, sock->file->f_flags); |
1522 | if (err < 0) | |
39d8c1b6 | 1523 | goto out_fd; |
1da177e4 LT |
1524 | |
1525 | if (upeer_sockaddr) { | |
230b1839 | 1526 | if (newsock->ops->getname(newsock, (struct sockaddr *)&address, |
89bddce5 | 1527 | &len, 2) < 0) { |
1da177e4 | 1528 | err = -ECONNABORTED; |
39d8c1b6 | 1529 | goto out_fd; |
1da177e4 | 1530 | } |
230b1839 YH |
1531 | err = move_addr_to_user((struct sockaddr *)&address, |
1532 | len, upeer_sockaddr, upeer_addrlen); | |
1da177e4 | 1533 | if (err < 0) |
39d8c1b6 | 1534 | goto out_fd; |
1da177e4 LT |
1535 | } |
1536 | ||
1537 | /* File flags are not inherited via accept() unlike another OSes. */ | |
1538 | ||
39d8c1b6 DM |
1539 | fd_install(newfd, newfile); |
1540 | err = newfd; | |
1da177e4 | 1541 | |
1da177e4 | 1542 | out_put: |
6cb153ca | 1543 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1544 | out: |
1545 | return err; | |
39d8c1b6 | 1546 | out_fd: |
9606a216 | 1547 | fput(newfile); |
39d8c1b6 | 1548 | put_unused_fd(newfd); |
1da177e4 LT |
1549 | goto out_put; |
1550 | } | |
1551 | ||
20f37034 HC |
1552 | SYSCALL_DEFINE3(accept, int, fd, struct sockaddr __user *, upeer_sockaddr, |
1553 | int __user *, upeer_addrlen) | |
aaca0bdc | 1554 | { |
de11defe | 1555 | return sys_accept4(fd, upeer_sockaddr, upeer_addrlen, 0); |
aaca0bdc UD |
1556 | } |
1557 | ||
1da177e4 LT |
1558 | /* |
1559 | * Attempt to connect to a socket with the server address. The address | |
1560 | * is in user space so we verify it is OK and move it to kernel space. | |
1561 | * | |
1562 | * For 1003.1g we need to add clean support for a bind to AF_UNSPEC to | |
1563 | * break bindings | |
1564 | * | |
1565 | * NOTE: 1003.1g draft 6.3 is broken with respect to AX.25/NetROM and | |
1566 | * other SEQPACKET protocols that take time to connect() as it doesn't | |
1567 | * include the -EINPROGRESS status for such sockets. | |
1568 | */ | |
1569 | ||
20f37034 HC |
1570 | SYSCALL_DEFINE3(connect, int, fd, struct sockaddr __user *, uservaddr, |
1571 | int, addrlen) | |
1da177e4 LT |
1572 | { |
1573 | struct socket *sock; | |
230b1839 | 1574 | struct sockaddr_storage address; |
6cb153ca | 1575 | int err, fput_needed; |
1da177e4 | 1576 | |
6cb153ca | 1577 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1578 | if (!sock) |
1579 | goto out; | |
230b1839 | 1580 | err = move_addr_to_kernel(uservaddr, addrlen, (struct sockaddr *)&address); |
1da177e4 LT |
1581 | if (err < 0) |
1582 | goto out_put; | |
1583 | ||
89bddce5 | 1584 | err = |
230b1839 | 1585 | security_socket_connect(sock, (struct sockaddr *)&address, addrlen); |
1da177e4 LT |
1586 | if (err) |
1587 | goto out_put; | |
1588 | ||
230b1839 | 1589 | err = sock->ops->connect(sock, (struct sockaddr *)&address, addrlen, |
1da177e4 LT |
1590 | sock->file->f_flags); |
1591 | out_put: | |
6cb153ca | 1592 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1593 | out: |
1594 | return err; | |
1595 | } | |
1596 | ||
1597 | /* | |
1598 | * Get the local address ('name') of a socket object. Move the obtained | |
1599 | * name to user space. | |
1600 | */ | |
1601 | ||
20f37034 HC |
1602 | SYSCALL_DEFINE3(getsockname, int, fd, struct sockaddr __user *, usockaddr, |
1603 | int __user *, usockaddr_len) | |
1da177e4 LT |
1604 | { |
1605 | struct socket *sock; | |
230b1839 | 1606 | struct sockaddr_storage address; |
6cb153ca | 1607 | int len, err, fput_needed; |
89bddce5 | 1608 | |
6cb153ca | 1609 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 LT |
1610 | if (!sock) |
1611 | goto out; | |
1612 | ||
1613 | err = security_socket_getsockname(sock); | |
1614 | if (err) | |
1615 | goto out_put; | |
1616 | ||
230b1839 | 1617 | err = sock->ops->getname(sock, (struct sockaddr *)&address, &len, 0); |
1da177e4 LT |
1618 | if (err) |
1619 | goto out_put; | |
230b1839 | 1620 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, usockaddr_len); |
1da177e4 LT |
1621 | |
1622 | out_put: | |
6cb153ca | 1623 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1624 | out: |
1625 | return err; | |
1626 | } | |
1627 | ||
1628 | /* | |
1629 | * Get the remote address ('name') of a socket object. Move the obtained | |
1630 | * name to user space. | |
1631 | */ | |
1632 | ||
20f37034 HC |
1633 | SYSCALL_DEFINE3(getpeername, int, fd, struct sockaddr __user *, usockaddr, |
1634 | int __user *, usockaddr_len) | |
1da177e4 LT |
1635 | { |
1636 | struct socket *sock; | |
230b1839 | 1637 | struct sockaddr_storage address; |
6cb153ca | 1638 | int len, err, fput_needed; |
1da177e4 | 1639 | |
89bddce5 SH |
1640 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1641 | if (sock != NULL) { | |
1da177e4 LT |
1642 | err = security_socket_getpeername(sock); |
1643 | if (err) { | |
6cb153ca | 1644 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1645 | return err; |
1646 | } | |
1647 | ||
89bddce5 | 1648 | err = |
230b1839 | 1649 | sock->ops->getname(sock, (struct sockaddr *)&address, &len, |
89bddce5 | 1650 | 1); |
1da177e4 | 1651 | if (!err) |
230b1839 | 1652 | err = move_addr_to_user((struct sockaddr *)&address, len, usockaddr, |
89bddce5 | 1653 | usockaddr_len); |
6cb153ca | 1654 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
1655 | } |
1656 | return err; | |
1657 | } | |
1658 | ||
1659 | /* | |
1660 | * Send a datagram to a given address. We move the address into kernel | |
1661 | * space and check the user space data area is readable before invoking | |
1662 | * the protocol. | |
1663 | */ | |
1664 | ||
3e0fa65f HC |
1665 | SYSCALL_DEFINE6(sendto, int, fd, void __user *, buff, size_t, len, |
1666 | unsigned, flags, struct sockaddr __user *, addr, | |
1667 | int, addr_len) | |
1da177e4 LT |
1668 | { |
1669 | struct socket *sock; | |
230b1839 | 1670 | struct sockaddr_storage address; |
1da177e4 LT |
1671 | int err; |
1672 | struct msghdr msg; | |
1673 | struct iovec iov; | |
6cb153ca | 1674 | int fput_needed; |
6cb153ca | 1675 | |
253eacc0 LT |
1676 | if (len > INT_MAX) |
1677 | len = INT_MAX; | |
de0fa95c PE |
1678 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1679 | if (!sock) | |
4387ff75 | 1680 | goto out; |
6cb153ca | 1681 | |
89bddce5 SH |
1682 | iov.iov_base = buff; |
1683 | iov.iov_len = len; | |
1684 | msg.msg_name = NULL; | |
1685 | msg.msg_iov = &iov; | |
1686 | msg.msg_iovlen = 1; | |
1687 | msg.msg_control = NULL; | |
1688 | msg.msg_controllen = 0; | |
1689 | msg.msg_namelen = 0; | |
6cb153ca | 1690 | if (addr) { |
230b1839 | 1691 | err = move_addr_to_kernel(addr, addr_len, (struct sockaddr *)&address); |
1da177e4 LT |
1692 | if (err < 0) |
1693 | goto out_put; | |
230b1839 | 1694 | msg.msg_name = (struct sockaddr *)&address; |
89bddce5 | 1695 | msg.msg_namelen = addr_len; |
1da177e4 LT |
1696 | } |
1697 | if (sock->file->f_flags & O_NONBLOCK) | |
1698 | flags |= MSG_DONTWAIT; | |
1699 | msg.msg_flags = flags; | |
1700 | err = sock_sendmsg(sock, &msg, len); | |
1701 | ||
89bddce5 | 1702 | out_put: |
de0fa95c | 1703 | fput_light(sock->file, fput_needed); |
4387ff75 | 1704 | out: |
1da177e4 LT |
1705 | return err; |
1706 | } | |
1707 | ||
1708 | /* | |
89bddce5 | 1709 | * Send a datagram down a socket. |
1da177e4 LT |
1710 | */ |
1711 | ||
3e0fa65f HC |
1712 | SYSCALL_DEFINE4(send, int, fd, void __user *, buff, size_t, len, |
1713 | unsigned, flags) | |
1da177e4 LT |
1714 | { |
1715 | return sys_sendto(fd, buff, len, flags, NULL, 0); | |
1716 | } | |
1717 | ||
1718 | /* | |
89bddce5 | 1719 | * Receive a frame from the socket and optionally record the address of the |
1da177e4 LT |
1720 | * sender. We verify the buffers are writable and if needed move the |
1721 | * sender address from kernel to user space. | |
1722 | */ | |
1723 | ||
3e0fa65f HC |
1724 | SYSCALL_DEFINE6(recvfrom, int, fd, void __user *, ubuf, size_t, size, |
1725 | unsigned, flags, struct sockaddr __user *, addr, | |
1726 | int __user *, addr_len) | |
1da177e4 LT |
1727 | { |
1728 | struct socket *sock; | |
1729 | struct iovec iov; | |
1730 | struct msghdr msg; | |
230b1839 | 1731 | struct sockaddr_storage address; |
89bddce5 | 1732 | int err, err2; |
6cb153ca BL |
1733 | int fput_needed; |
1734 | ||
253eacc0 LT |
1735 | if (size > INT_MAX) |
1736 | size = INT_MAX; | |
de0fa95c | 1737 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1da177e4 | 1738 | if (!sock) |
de0fa95c | 1739 | goto out; |
1da177e4 | 1740 | |
89bddce5 SH |
1741 | msg.msg_control = NULL; |
1742 | msg.msg_controllen = 0; | |
1743 | msg.msg_iovlen = 1; | |
1744 | msg.msg_iov = &iov; | |
1745 | iov.iov_len = size; | |
1746 | iov.iov_base = ubuf; | |
230b1839 YH |
1747 | msg.msg_name = (struct sockaddr *)&address; |
1748 | msg.msg_namelen = sizeof(address); | |
1da177e4 LT |
1749 | if (sock->file->f_flags & O_NONBLOCK) |
1750 | flags |= MSG_DONTWAIT; | |
89bddce5 | 1751 | err = sock_recvmsg(sock, &msg, size, flags); |
1da177e4 | 1752 | |
89bddce5 | 1753 | if (err >= 0 && addr != NULL) { |
230b1839 YH |
1754 | err2 = move_addr_to_user((struct sockaddr *)&address, |
1755 | msg.msg_namelen, addr, addr_len); | |
89bddce5 SH |
1756 | if (err2 < 0) |
1757 | err = err2; | |
1da177e4 | 1758 | } |
de0fa95c PE |
1759 | |
1760 | fput_light(sock->file, fput_needed); | |
4387ff75 | 1761 | out: |
1da177e4 LT |
1762 | return err; |
1763 | } | |
1764 | ||
1765 | /* | |
89bddce5 | 1766 | * Receive a datagram from a socket. |
1da177e4 LT |
1767 | */ |
1768 | ||
89bddce5 SH |
1769 | asmlinkage long sys_recv(int fd, void __user *ubuf, size_t size, |
1770 | unsigned flags) | |
1da177e4 LT |
1771 | { |
1772 | return sys_recvfrom(fd, ubuf, size, flags, NULL, NULL); | |
1773 | } | |
1774 | ||
1775 | /* | |
1776 | * Set a socket option. Because we don't know the option lengths we have | |
1777 | * to pass the user mode parameter for the protocols to sort out. | |
1778 | */ | |
1779 | ||
20f37034 HC |
1780 | SYSCALL_DEFINE5(setsockopt, int, fd, int, level, int, optname, |
1781 | char __user *, optval, int, optlen) | |
1da177e4 | 1782 | { |
6cb153ca | 1783 | int err, fput_needed; |
1da177e4 LT |
1784 | struct socket *sock; |
1785 | ||
1786 | if (optlen < 0) | |
1787 | return -EINVAL; | |
89bddce5 SH |
1788 | |
1789 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
1790 | if (sock != NULL) { | |
1791 | err = security_socket_setsockopt(sock, level, optname); | |
6cb153ca BL |
1792 | if (err) |
1793 | goto out_put; | |
1da177e4 LT |
1794 | |
1795 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1796 | err = |
1797 | sock_setsockopt(sock, level, optname, optval, | |
1798 | optlen); | |
1da177e4 | 1799 | else |
89bddce5 SH |
1800 | err = |
1801 | sock->ops->setsockopt(sock, level, optname, optval, | |
1802 | optlen); | |
6cb153ca BL |
1803 | out_put: |
1804 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1805 | } |
1806 | return err; | |
1807 | } | |
1808 | ||
1809 | /* | |
1810 | * Get a socket option. Because we don't know the option lengths we have | |
1811 | * to pass a user mode parameter for the protocols to sort out. | |
1812 | */ | |
1813 | ||
20f37034 HC |
1814 | SYSCALL_DEFINE5(getsockopt, int, fd, int, level, int, optname, |
1815 | char __user *, optval, int __user *, optlen) | |
1da177e4 | 1816 | { |
6cb153ca | 1817 | int err, fput_needed; |
1da177e4 LT |
1818 | struct socket *sock; |
1819 | ||
89bddce5 SH |
1820 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1821 | if (sock != NULL) { | |
6cb153ca BL |
1822 | err = security_socket_getsockopt(sock, level, optname); |
1823 | if (err) | |
1824 | goto out_put; | |
1da177e4 LT |
1825 | |
1826 | if (level == SOL_SOCKET) | |
89bddce5 SH |
1827 | err = |
1828 | sock_getsockopt(sock, level, optname, optval, | |
1829 | optlen); | |
1da177e4 | 1830 | else |
89bddce5 SH |
1831 | err = |
1832 | sock->ops->getsockopt(sock, level, optname, optval, | |
1833 | optlen); | |
6cb153ca BL |
1834 | out_put: |
1835 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1836 | } |
1837 | return err; | |
1838 | } | |
1839 | ||
1da177e4 LT |
1840 | /* |
1841 | * Shutdown a socket. | |
1842 | */ | |
1843 | ||
754fe8d2 | 1844 | SYSCALL_DEFINE2(shutdown, int, fd, int, how) |
1da177e4 | 1845 | { |
6cb153ca | 1846 | int err, fput_needed; |
1da177e4 LT |
1847 | struct socket *sock; |
1848 | ||
89bddce5 SH |
1849 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
1850 | if (sock != NULL) { | |
1da177e4 | 1851 | err = security_socket_shutdown(sock, how); |
6cb153ca BL |
1852 | if (!err) |
1853 | err = sock->ops->shutdown(sock, how); | |
1854 | fput_light(sock->file, fput_needed); | |
1da177e4 LT |
1855 | } |
1856 | return err; | |
1857 | } | |
1858 | ||
89bddce5 | 1859 | /* A couple of helpful macros for getting the address of the 32/64 bit |
1da177e4 LT |
1860 | * fields which are the same type (int / unsigned) on our platforms. |
1861 | */ | |
1862 | #define COMPAT_MSG(msg, member) ((MSG_CMSG_COMPAT & flags) ? &msg##_compat->member : &msg->member) | |
1863 | #define COMPAT_NAMELEN(msg) COMPAT_MSG(msg, msg_namelen) | |
1864 | #define COMPAT_FLAGS(msg) COMPAT_MSG(msg, msg_flags) | |
1865 | ||
1da177e4 LT |
1866 | /* |
1867 | * BSD sendmsg interface | |
1868 | */ | |
1869 | ||
3e0fa65f | 1870 | SYSCALL_DEFINE3(sendmsg, int, fd, struct msghdr __user *, msg, unsigned, flags) |
1da177e4 | 1871 | { |
89bddce5 SH |
1872 | struct compat_msghdr __user *msg_compat = |
1873 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1874 | struct socket *sock; |
230b1839 | 1875 | struct sockaddr_storage address; |
1da177e4 | 1876 | struct iovec iovstack[UIO_FASTIOV], *iov = iovstack; |
b9d717a7 | 1877 | unsigned char ctl[sizeof(struct cmsghdr) + 20] |
89bddce5 SH |
1878 | __attribute__ ((aligned(sizeof(__kernel_size_t)))); |
1879 | /* 20 is size of ipv6_pktinfo */ | |
1da177e4 LT |
1880 | unsigned char *ctl_buf = ctl; |
1881 | struct msghdr msg_sys; | |
1882 | int err, ctl_len, iov_size, total_len; | |
6cb153ca | 1883 | int fput_needed; |
89bddce5 | 1884 | |
1da177e4 LT |
1885 | err = -EFAULT; |
1886 | if (MSG_CMSG_COMPAT & flags) { | |
1887 | if (get_compat_msghdr(&msg_sys, msg_compat)) | |
1888 | return -EFAULT; | |
c6d409cf | 1889 | } else if (copy_from_user(&msg_sys, msg, sizeof(struct msghdr))) |
1da177e4 LT |
1890 | return -EFAULT; |
1891 | ||
6cb153ca | 1892 | sock = sockfd_lookup_light(fd, &err, &fput_needed); |
89bddce5 | 1893 | if (!sock) |
1da177e4 LT |
1894 | goto out; |
1895 | ||
1896 | /* do not move before msg_sys is valid */ | |
1897 | err = -EMSGSIZE; | |
1898 | if (msg_sys.msg_iovlen > UIO_MAXIOV) | |
1899 | goto out_put; | |
1900 | ||
89bddce5 | 1901 | /* Check whether to allocate the iovec area */ |
1da177e4 LT |
1902 | err = -ENOMEM; |
1903 | iov_size = msg_sys.msg_iovlen * sizeof(struct iovec); | |
1904 | if (msg_sys.msg_iovlen > UIO_FASTIOV) { | |
1905 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); | |
1906 | if (!iov) | |
1907 | goto out_put; | |
1908 | } | |
1909 | ||
1910 | /* This will also move the address data into kernel space */ | |
1911 | if (MSG_CMSG_COMPAT & flags) { | |
230b1839 YH |
1912 | err = verify_compat_iovec(&msg_sys, iov, |
1913 | (struct sockaddr *)&address, | |
1914 | VERIFY_READ); | |
1da177e4 | 1915 | } else |
230b1839 YH |
1916 | err = verify_iovec(&msg_sys, iov, |
1917 | (struct sockaddr *)&address, | |
1918 | VERIFY_READ); | |
89bddce5 | 1919 | if (err < 0) |
1da177e4 LT |
1920 | goto out_freeiov; |
1921 | total_len = err; | |
1922 | ||
1923 | err = -ENOBUFS; | |
1924 | ||
1925 | if (msg_sys.msg_controllen > INT_MAX) | |
1926 | goto out_freeiov; | |
89bddce5 | 1927 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1928 | if ((MSG_CMSG_COMPAT & flags) && ctl_len) { |
89bddce5 SH |
1929 | err = |
1930 | cmsghdr_from_user_compat_to_kern(&msg_sys, sock->sk, ctl, | |
1931 | sizeof(ctl)); | |
1da177e4 LT |
1932 | if (err) |
1933 | goto out_freeiov; | |
1934 | ctl_buf = msg_sys.msg_control; | |
8920e8f9 | 1935 | ctl_len = msg_sys.msg_controllen; |
1da177e4 | 1936 | } else if (ctl_len) { |
89bddce5 | 1937 | if (ctl_len > sizeof(ctl)) { |
1da177e4 | 1938 | ctl_buf = sock_kmalloc(sock->sk, ctl_len, GFP_KERNEL); |
89bddce5 | 1939 | if (ctl_buf == NULL) |
1da177e4 LT |
1940 | goto out_freeiov; |
1941 | } | |
1942 | err = -EFAULT; | |
1943 | /* | |
1944 | * Careful! Before this, msg_sys.msg_control contains a user pointer. | |
1945 | * Afterwards, it will be a kernel pointer. Thus the compiler-assisted | |
1946 | * checking falls down on this. | |
1947 | */ | |
fb8621bb NK |
1948 | if (copy_from_user(ctl_buf, |
1949 | (void __user __force *)msg_sys.msg_control, | |
89bddce5 | 1950 | ctl_len)) |
1da177e4 LT |
1951 | goto out_freectl; |
1952 | msg_sys.msg_control = ctl_buf; | |
1953 | } | |
1954 | msg_sys.msg_flags = flags; | |
1955 | ||
1956 | if (sock->file->f_flags & O_NONBLOCK) | |
1957 | msg_sys.msg_flags |= MSG_DONTWAIT; | |
1958 | err = sock_sendmsg(sock, &msg_sys, total_len); | |
1959 | ||
1960 | out_freectl: | |
89bddce5 | 1961 | if (ctl_buf != ctl) |
1da177e4 LT |
1962 | sock_kfree_s(sock->sk, ctl_buf, ctl_len); |
1963 | out_freeiov: | |
1964 | if (iov != iovstack) | |
1965 | sock_kfree_s(sock->sk, iov, iov_size); | |
1966 | out_put: | |
6cb153ca | 1967 | fput_light(sock->file, fput_needed); |
89bddce5 | 1968 | out: |
1da177e4 LT |
1969 | return err; |
1970 | } | |
1971 | ||
a2e27255 ACM |
1972 | static int __sys_recvmsg(struct socket *sock, struct msghdr __user *msg, |
1973 | struct msghdr *msg_sys, unsigned flags, int nosec) | |
1da177e4 | 1974 | { |
89bddce5 SH |
1975 | struct compat_msghdr __user *msg_compat = |
1976 | (struct compat_msghdr __user *)msg; | |
1da177e4 | 1977 | struct iovec iovstack[UIO_FASTIOV]; |
89bddce5 | 1978 | struct iovec *iov = iovstack; |
1da177e4 LT |
1979 | unsigned long cmsg_ptr; |
1980 | int err, iov_size, total_len, len; | |
1981 | ||
1982 | /* kernel mode address */ | |
230b1839 | 1983 | struct sockaddr_storage addr; |
1da177e4 LT |
1984 | |
1985 | /* user mode address pointers */ | |
1986 | struct sockaddr __user *uaddr; | |
1987 | int __user *uaddr_len; | |
89bddce5 | 1988 | |
1da177e4 | 1989 | if (MSG_CMSG_COMPAT & flags) { |
a2e27255 | 1990 | if (get_compat_msghdr(msg_sys, msg_compat)) |
1da177e4 | 1991 | return -EFAULT; |
c6d409cf | 1992 | } else if (copy_from_user(msg_sys, msg, sizeof(struct msghdr))) |
89bddce5 | 1993 | return -EFAULT; |
1da177e4 | 1994 | |
1da177e4 | 1995 | err = -EMSGSIZE; |
a2e27255 ACM |
1996 | if (msg_sys->msg_iovlen > UIO_MAXIOV) |
1997 | goto out; | |
89bddce5 SH |
1998 | |
1999 | /* Check whether to allocate the iovec area */ | |
1da177e4 | 2000 | err = -ENOMEM; |
a2e27255 ACM |
2001 | iov_size = msg_sys->msg_iovlen * sizeof(struct iovec); |
2002 | if (msg_sys->msg_iovlen > UIO_FASTIOV) { | |
1da177e4 LT |
2003 | iov = sock_kmalloc(sock->sk, iov_size, GFP_KERNEL); |
2004 | if (!iov) | |
a2e27255 | 2005 | goto out; |
1da177e4 LT |
2006 | } |
2007 | ||
2008 | /* | |
89bddce5 SH |
2009 | * Save the user-mode address (verify_iovec will change the |
2010 | * kernel msghdr to use the kernel address space) | |
1da177e4 | 2011 | */ |
89bddce5 | 2012 | |
a2e27255 | 2013 | uaddr = (__force void __user *)msg_sys->msg_name; |
1da177e4 LT |
2014 | uaddr_len = COMPAT_NAMELEN(msg); |
2015 | if (MSG_CMSG_COMPAT & flags) { | |
a2e27255 | 2016 | err = verify_compat_iovec(msg_sys, iov, |
230b1839 YH |
2017 | (struct sockaddr *)&addr, |
2018 | VERIFY_WRITE); | |
1da177e4 | 2019 | } else |
a2e27255 | 2020 | err = verify_iovec(msg_sys, iov, |
230b1839 YH |
2021 | (struct sockaddr *)&addr, |
2022 | VERIFY_WRITE); | |
1da177e4 LT |
2023 | if (err < 0) |
2024 | goto out_freeiov; | |
89bddce5 | 2025 | total_len = err; |
1da177e4 | 2026 | |
a2e27255 ACM |
2027 | cmsg_ptr = (unsigned long)msg_sys->msg_control; |
2028 | msg_sys->msg_flags = flags & (MSG_CMSG_CLOEXEC|MSG_CMSG_COMPAT); | |
89bddce5 | 2029 | |
1da177e4 LT |
2030 | if (sock->file->f_flags & O_NONBLOCK) |
2031 | flags |= MSG_DONTWAIT; | |
a2e27255 ACM |
2032 | err = (nosec ? sock_recvmsg_nosec : sock_recvmsg)(sock, msg_sys, |
2033 | total_len, flags); | |
1da177e4 LT |
2034 | if (err < 0) |
2035 | goto out_freeiov; | |
2036 | len = err; | |
2037 | ||
2038 | if (uaddr != NULL) { | |
230b1839 | 2039 | err = move_addr_to_user((struct sockaddr *)&addr, |
a2e27255 | 2040 | msg_sys->msg_namelen, uaddr, |
89bddce5 | 2041 | uaddr_len); |
1da177e4 LT |
2042 | if (err < 0) |
2043 | goto out_freeiov; | |
2044 | } | |
a2e27255 | 2045 | err = __put_user((msg_sys->msg_flags & ~MSG_CMSG_COMPAT), |
37f7f421 | 2046 | COMPAT_FLAGS(msg)); |
1da177e4 LT |
2047 | if (err) |
2048 | goto out_freeiov; | |
2049 | if (MSG_CMSG_COMPAT & flags) | |
a2e27255 | 2050 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2051 | &msg_compat->msg_controllen); |
2052 | else | |
a2e27255 | 2053 | err = __put_user((unsigned long)msg_sys->msg_control - cmsg_ptr, |
1da177e4 LT |
2054 | &msg->msg_controllen); |
2055 | if (err) | |
2056 | goto out_freeiov; | |
2057 | err = len; | |
2058 | ||
2059 | out_freeiov: | |
2060 | if (iov != iovstack) | |
2061 | sock_kfree_s(sock->sk, iov, iov_size); | |
a2e27255 ACM |
2062 | out: |
2063 | return err; | |
2064 | } | |
2065 | ||
2066 | /* | |
2067 | * BSD recvmsg interface | |
2068 | */ | |
2069 | ||
2070 | SYSCALL_DEFINE3(recvmsg, int, fd, struct msghdr __user *, msg, | |
2071 | unsigned int, flags) | |
2072 | { | |
2073 | int fput_needed, err; | |
2074 | struct msghdr msg_sys; | |
2075 | struct socket *sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2076 | ||
2077 | if (!sock) | |
2078 | goto out; | |
2079 | ||
2080 | err = __sys_recvmsg(sock, msg, &msg_sys, flags, 0); | |
2081 | ||
6cb153ca | 2082 | fput_light(sock->file, fput_needed); |
1da177e4 LT |
2083 | out: |
2084 | return err; | |
2085 | } | |
2086 | ||
a2e27255 ACM |
2087 | /* |
2088 | * Linux recvmmsg interface | |
2089 | */ | |
2090 | ||
2091 | int __sys_recvmmsg(int fd, struct mmsghdr __user *mmsg, unsigned int vlen, | |
2092 | unsigned int flags, struct timespec *timeout) | |
2093 | { | |
2094 | int fput_needed, err, datagrams; | |
2095 | struct socket *sock; | |
2096 | struct mmsghdr __user *entry; | |
d7256d0e | 2097 | struct compat_mmsghdr __user *compat_entry; |
a2e27255 ACM |
2098 | struct msghdr msg_sys; |
2099 | struct timespec end_time; | |
2100 | ||
2101 | if (timeout && | |
2102 | poll_select_set_timeout(&end_time, timeout->tv_sec, | |
2103 | timeout->tv_nsec)) | |
2104 | return -EINVAL; | |
2105 | ||
2106 | datagrams = 0; | |
2107 | ||
2108 | sock = sockfd_lookup_light(fd, &err, &fput_needed); | |
2109 | if (!sock) | |
2110 | return err; | |
2111 | ||
2112 | err = sock_error(sock->sk); | |
2113 | if (err) | |
2114 | goto out_put; | |
2115 | ||
2116 | entry = mmsg; | |
d7256d0e | 2117 | compat_entry = (struct compat_mmsghdr __user *)mmsg; |
a2e27255 ACM |
2118 | |
2119 | while (datagrams < vlen) { | |
2120 | /* | |
2121 | * No need to ask LSM for more than the first datagram. | |
2122 | */ | |
d7256d0e JMG |
2123 | if (MSG_CMSG_COMPAT & flags) { |
2124 | err = __sys_recvmsg(sock, (struct msghdr __user *)compat_entry, | |
2125 | &msg_sys, flags, datagrams); | |
2126 | if (err < 0) | |
2127 | break; | |
2128 | err = __put_user(err, &compat_entry->msg_len); | |
2129 | ++compat_entry; | |
2130 | } else { | |
2131 | err = __sys_recvmsg(sock, (struct msghdr __user *)entry, | |
2132 | &msg_sys, flags, datagrams); | |
2133 | if (err < 0) | |
2134 | break; | |
2135 | err = put_user(err, &entry->msg_len); | |
2136 | ++entry; | |
2137 | } | |
2138 | ||
a2e27255 ACM |
2139 | if (err) |
2140 | break; | |
a2e27255 ACM |
2141 | ++datagrams; |
2142 | ||
71c5c159 BB |
2143 | /* MSG_WAITFORONE turns on MSG_DONTWAIT after one packet */ |
2144 | if (flags & MSG_WAITFORONE) | |
2145 | flags |= MSG_DONTWAIT; | |
2146 | ||
a2e27255 ACM |
2147 | if (timeout) { |
2148 | ktime_get_ts(timeout); | |
2149 | *timeout = timespec_sub(end_time, *timeout); | |
2150 | if (timeout->tv_sec < 0) { | |
2151 | timeout->tv_sec = timeout->tv_nsec = 0; | |
2152 | break; | |
2153 | } | |
2154 | ||
2155 | /* Timeout, return less than vlen datagrams */ | |
2156 | if (timeout->tv_nsec == 0 && timeout->tv_sec == 0) | |
2157 | break; | |
2158 | } | |
2159 | ||
2160 | /* Out of band data, return right away */ | |
2161 | if (msg_sys.msg_flags & MSG_OOB) | |
2162 | break; | |
2163 | } | |
2164 | ||
2165 | out_put: | |
2166 | fput_light(sock->file, fput_needed); | |
1da177e4 | 2167 | |
a2e27255 ACM |
2168 | if (err == 0) |
2169 | return datagrams; | |
2170 | ||
2171 | if (datagrams != 0) { | |
2172 | /* | |
2173 | * We may return less entries than requested (vlen) if the | |
2174 | * sock is non block and there aren't enough datagrams... | |
2175 | */ | |
2176 | if (err != -EAGAIN) { | |
2177 | /* | |
2178 | * ... or if recvmsg returns an error after we | |
2179 | * received some datagrams, where we record the | |
2180 | * error to return on the next call or if the | |
2181 | * app asks about it using getsockopt(SO_ERROR). | |
2182 | */ | |
2183 | sock->sk->sk_err = -err; | |
2184 | } | |
2185 | ||
2186 | return datagrams; | |
2187 | } | |
2188 | ||
2189 | return err; | |
2190 | } | |
2191 | ||
2192 | SYSCALL_DEFINE5(recvmmsg, int, fd, struct mmsghdr __user *, mmsg, | |
2193 | unsigned int, vlen, unsigned int, flags, | |
2194 | struct timespec __user *, timeout) | |
2195 | { | |
2196 | int datagrams; | |
2197 | struct timespec timeout_sys; | |
2198 | ||
2199 | if (!timeout) | |
2200 | return __sys_recvmmsg(fd, mmsg, vlen, flags, NULL); | |
2201 | ||
2202 | if (copy_from_user(&timeout_sys, timeout, sizeof(timeout_sys))) | |
2203 | return -EFAULT; | |
2204 | ||
2205 | datagrams = __sys_recvmmsg(fd, mmsg, vlen, flags, &timeout_sys); | |
2206 | ||
2207 | if (datagrams > 0 && | |
2208 | copy_to_user(timeout, &timeout_sys, sizeof(timeout_sys))) | |
2209 | datagrams = -EFAULT; | |
2210 | ||
2211 | return datagrams; | |
2212 | } | |
2213 | ||
2214 | #ifdef __ARCH_WANT_SYS_SOCKETCALL | |
1da177e4 LT |
2215 | /* Argument list sizes for sys_socketcall */ |
2216 | #define AL(x) ((x) * sizeof(unsigned long)) | |
a2e27255 | 2217 | static const unsigned char nargs[20] = { |
c6d409cf ED |
2218 | AL(0), AL(3), AL(3), AL(3), AL(2), AL(3), |
2219 | AL(3), AL(3), AL(4), AL(4), AL(4), AL(6), | |
2220 | AL(6), AL(2), AL(5), AL(5), AL(3), AL(3), | |
2221 | AL(4), AL(5) | |
89bddce5 SH |
2222 | }; |
2223 | ||
1da177e4 LT |
2224 | #undef AL |
2225 | ||
2226 | /* | |
89bddce5 | 2227 | * System call vectors. |
1da177e4 LT |
2228 | * |
2229 | * Argument checking cleaned up. Saved 20% in size. | |
2230 | * This function doesn't need to set the kernel lock because | |
89bddce5 | 2231 | * it is set by the callees. |
1da177e4 LT |
2232 | */ |
2233 | ||
3e0fa65f | 2234 | SYSCALL_DEFINE2(socketcall, int, call, unsigned long __user *, args) |
1da177e4 LT |
2235 | { |
2236 | unsigned long a[6]; | |
89bddce5 | 2237 | unsigned long a0, a1; |
1da177e4 | 2238 | int err; |
47379052 | 2239 | unsigned int len; |
1da177e4 | 2240 | |
a2e27255 | 2241 | if (call < 1 || call > SYS_RECVMMSG) |
1da177e4 LT |
2242 | return -EINVAL; |
2243 | ||
47379052 AV |
2244 | len = nargs[call]; |
2245 | if (len > sizeof(a)) | |
2246 | return -EINVAL; | |
2247 | ||
1da177e4 | 2248 | /* copy_from_user should be SMP safe. */ |
47379052 | 2249 | if (copy_from_user(a, args, len)) |
1da177e4 | 2250 | return -EFAULT; |
3ec3b2fb | 2251 | |
f3298dc4 | 2252 | audit_socketcall(nargs[call] / sizeof(unsigned long), a); |
3ec3b2fb | 2253 | |
89bddce5 SH |
2254 | a0 = a[0]; |
2255 | a1 = a[1]; | |
2256 | ||
2257 | switch (call) { | |
2258 | case SYS_SOCKET: | |
2259 | err = sys_socket(a0, a1, a[2]); | |
2260 | break; | |
2261 | case SYS_BIND: | |
2262 | err = sys_bind(a0, (struct sockaddr __user *)a1, a[2]); | |
2263 | break; | |
2264 | case SYS_CONNECT: | |
2265 | err = sys_connect(a0, (struct sockaddr __user *)a1, a[2]); | |
2266 | break; | |
2267 | case SYS_LISTEN: | |
2268 | err = sys_listen(a0, a1); | |
2269 | break; | |
2270 | case SYS_ACCEPT: | |
de11defe UD |
2271 | err = sys_accept4(a0, (struct sockaddr __user *)a1, |
2272 | (int __user *)a[2], 0); | |
89bddce5 SH |
2273 | break; |
2274 | case SYS_GETSOCKNAME: | |
2275 | err = | |
2276 | sys_getsockname(a0, (struct sockaddr __user *)a1, | |
2277 | (int __user *)a[2]); | |
2278 | break; | |
2279 | case SYS_GETPEERNAME: | |
2280 | err = | |
2281 | sys_getpeername(a0, (struct sockaddr __user *)a1, | |
2282 | (int __user *)a[2]); | |
2283 | break; | |
2284 | case SYS_SOCKETPAIR: | |
2285 | err = sys_socketpair(a0, a1, a[2], (int __user *)a[3]); | |
2286 | break; | |
2287 | case SYS_SEND: | |
2288 | err = sys_send(a0, (void __user *)a1, a[2], a[3]); | |
2289 | break; | |
2290 | case SYS_SENDTO: | |
2291 | err = sys_sendto(a0, (void __user *)a1, a[2], a[3], | |
2292 | (struct sockaddr __user *)a[4], a[5]); | |
2293 | break; | |
2294 | case SYS_RECV: | |
2295 | err = sys_recv(a0, (void __user *)a1, a[2], a[3]); | |
2296 | break; | |
2297 | case SYS_RECVFROM: | |
2298 | err = sys_recvfrom(a0, (void __user *)a1, a[2], a[3], | |
2299 | (struct sockaddr __user *)a[4], | |
2300 | (int __user *)a[5]); | |
2301 | break; | |
2302 | case SYS_SHUTDOWN: | |
2303 | err = sys_shutdown(a0, a1); | |
2304 | break; | |
2305 | case SYS_SETSOCKOPT: | |
2306 | err = sys_setsockopt(a0, a1, a[2], (char __user *)a[3], a[4]); | |
2307 | break; | |
2308 | case SYS_GETSOCKOPT: | |
2309 | err = | |
2310 | sys_getsockopt(a0, a1, a[2], (char __user *)a[3], | |
2311 | (int __user *)a[4]); | |
2312 | break; | |
2313 | case SYS_SENDMSG: | |
2314 | err = sys_sendmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2315 | break; | |
2316 | case SYS_RECVMSG: | |
2317 | err = sys_recvmsg(a0, (struct msghdr __user *)a1, a[2]); | |
2318 | break; | |
a2e27255 ACM |
2319 | case SYS_RECVMMSG: |
2320 | err = sys_recvmmsg(a0, (struct mmsghdr __user *)a1, a[2], a[3], | |
2321 | (struct timespec __user *)a[4]); | |
2322 | break; | |
de11defe UD |
2323 | case SYS_ACCEPT4: |
2324 | err = sys_accept4(a0, (struct sockaddr __user *)a1, | |
2325 | (int __user *)a[2], a[3]); | |
aaca0bdc | 2326 | break; |
89bddce5 SH |
2327 | default: |
2328 | err = -EINVAL; | |
2329 | break; | |
1da177e4 LT |
2330 | } |
2331 | return err; | |
2332 | } | |
2333 | ||
89bddce5 | 2334 | #endif /* __ARCH_WANT_SYS_SOCKETCALL */ |
1da177e4 | 2335 | |
55737fda SH |
2336 | /** |
2337 | * sock_register - add a socket protocol handler | |
2338 | * @ops: description of protocol | |
2339 | * | |
1da177e4 LT |
2340 | * This function is called by a protocol handler that wants to |
2341 | * advertise its address family, and have it linked into the | |
55737fda SH |
2342 | * socket interface. The value ops->family coresponds to the |
2343 | * socket system call protocol family. | |
1da177e4 | 2344 | */ |
f0fd27d4 | 2345 | int sock_register(const struct net_proto_family *ops) |
1da177e4 LT |
2346 | { |
2347 | int err; | |
2348 | ||
2349 | if (ops->family >= NPROTO) { | |
89bddce5 SH |
2350 | printk(KERN_CRIT "protocol %d >= NPROTO(%d)\n", ops->family, |
2351 | NPROTO); | |
1da177e4 LT |
2352 | return -ENOBUFS; |
2353 | } | |
55737fda SH |
2354 | |
2355 | spin_lock(&net_family_lock); | |
190683a9 ED |
2356 | if (rcu_dereference_protected(net_families[ops->family], |
2357 | lockdep_is_held(&net_family_lock))) | |
55737fda SH |
2358 | err = -EEXIST; |
2359 | else { | |
190683a9 | 2360 | rcu_assign_pointer(net_families[ops->family], ops); |
1da177e4 LT |
2361 | err = 0; |
2362 | } | |
55737fda SH |
2363 | spin_unlock(&net_family_lock); |
2364 | ||
89bddce5 | 2365 | printk(KERN_INFO "NET: Registered protocol family %d\n", ops->family); |
1da177e4 LT |
2366 | return err; |
2367 | } | |
c6d409cf | 2368 | EXPORT_SYMBOL(sock_register); |
1da177e4 | 2369 | |
55737fda SH |
2370 | /** |
2371 | * sock_unregister - remove a protocol handler | |
2372 | * @family: protocol family to remove | |
2373 | * | |
1da177e4 LT |
2374 | * This function is called by a protocol handler that wants to |
2375 | * remove its address family, and have it unlinked from the | |
55737fda SH |
2376 | * new socket creation. |
2377 | * | |
2378 | * If protocol handler is a module, then it can use module reference | |
2379 | * counts to protect against new references. If protocol handler is not | |
2380 | * a module then it needs to provide its own protection in | |
2381 | * the ops->create routine. | |
1da177e4 | 2382 | */ |
f0fd27d4 | 2383 | void sock_unregister(int family) |
1da177e4 | 2384 | { |
f0fd27d4 | 2385 | BUG_ON(family < 0 || family >= NPROTO); |
1da177e4 | 2386 | |
55737fda | 2387 | spin_lock(&net_family_lock); |
190683a9 | 2388 | rcu_assign_pointer(net_families[family], NULL); |
55737fda SH |
2389 | spin_unlock(&net_family_lock); |
2390 | ||
2391 | synchronize_rcu(); | |
2392 | ||
89bddce5 | 2393 | printk(KERN_INFO "NET: Unregistered protocol family %d\n", family); |
1da177e4 | 2394 | } |
c6d409cf | 2395 | EXPORT_SYMBOL(sock_unregister); |
1da177e4 | 2396 | |
77d76ea3 | 2397 | static int __init sock_init(void) |
1da177e4 | 2398 | { |
b3e19d92 NP |
2399 | int err; |
2400 | ||
1da177e4 | 2401 | /* |
89bddce5 | 2402 | * Initialize sock SLAB cache. |
1da177e4 | 2403 | */ |
89bddce5 | 2404 | |
1da177e4 LT |
2405 | sk_init(); |
2406 | ||
1da177e4 | 2407 | /* |
89bddce5 | 2408 | * Initialize skbuff SLAB cache |
1da177e4 LT |
2409 | */ |
2410 | skb_init(); | |
1da177e4 LT |
2411 | |
2412 | /* | |
89bddce5 | 2413 | * Initialize the protocols module. |
1da177e4 LT |
2414 | */ |
2415 | ||
2416 | init_inodecache(); | |
b3e19d92 NP |
2417 | |
2418 | err = register_filesystem(&sock_fs_type); | |
2419 | if (err) | |
2420 | goto out_fs; | |
1da177e4 | 2421 | sock_mnt = kern_mount(&sock_fs_type); |
b3e19d92 NP |
2422 | if (IS_ERR(sock_mnt)) { |
2423 | err = PTR_ERR(sock_mnt); | |
2424 | goto out_mount; | |
2425 | } | |
77d76ea3 AK |
2426 | |
2427 | /* The real protocol initialization is performed in later initcalls. | |
1da177e4 LT |
2428 | */ |
2429 | ||
2430 | #ifdef CONFIG_NETFILTER | |
2431 | netfilter_init(); | |
2432 | #endif | |
cbeb321a | 2433 | |
c1f19b51 RC |
2434 | #ifdef CONFIG_NETWORK_PHY_TIMESTAMPING |
2435 | skb_timestamping_init(); | |
2436 | #endif | |
2437 | ||
b3e19d92 NP |
2438 | out: |
2439 | return err; | |
2440 | ||
2441 | out_mount: | |
2442 | unregister_filesystem(&sock_fs_type); | |
2443 | out_fs: | |
2444 | goto out; | |
1da177e4 LT |
2445 | } |
2446 | ||
77d76ea3 AK |
2447 | core_initcall(sock_init); /* early initcall */ |
2448 | ||
1da177e4 LT |
2449 | #ifdef CONFIG_PROC_FS |
2450 | void socket_seq_show(struct seq_file *seq) | |
2451 | { | |
2452 | int cpu; | |
2453 | int counter = 0; | |
2454 | ||
6f912042 | 2455 | for_each_possible_cpu(cpu) |
89bddce5 | 2456 | counter += per_cpu(sockets_in_use, cpu); |
1da177e4 LT |
2457 | |
2458 | /* It can be negative, by the way. 8) */ | |
2459 | if (counter < 0) | |
2460 | counter = 0; | |
2461 | ||
2462 | seq_printf(seq, "sockets: used %d\n", counter); | |
2463 | } | |
89bddce5 | 2464 | #endif /* CONFIG_PROC_FS */ |
1da177e4 | 2465 | |
89bbfc95 | 2466 | #ifdef CONFIG_COMPAT |
6b96018b AB |
2467 | static int do_siocgstamp(struct net *net, struct socket *sock, |
2468 | unsigned int cmd, struct compat_timeval __user *up) | |
7a229387 | 2469 | { |
7a229387 AB |
2470 | mm_segment_t old_fs = get_fs(); |
2471 | struct timeval ktv; | |
2472 | int err; | |
2473 | ||
2474 | set_fs(KERNEL_DS); | |
6b96018b | 2475 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&ktv); |
7a229387 AB |
2476 | set_fs(old_fs); |
2477 | if (!err) { | |
2478 | err = put_user(ktv.tv_sec, &up->tv_sec); | |
2479 | err |= __put_user(ktv.tv_usec, &up->tv_usec); | |
2480 | } | |
2481 | return err; | |
2482 | } | |
2483 | ||
6b96018b AB |
2484 | static int do_siocgstampns(struct net *net, struct socket *sock, |
2485 | unsigned int cmd, struct compat_timespec __user *up) | |
7a229387 | 2486 | { |
7a229387 AB |
2487 | mm_segment_t old_fs = get_fs(); |
2488 | struct timespec kts; | |
2489 | int err; | |
2490 | ||
2491 | set_fs(KERNEL_DS); | |
6b96018b | 2492 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)&kts); |
7a229387 AB |
2493 | set_fs(old_fs); |
2494 | if (!err) { | |
2495 | err = put_user(kts.tv_sec, &up->tv_sec); | |
2496 | err |= __put_user(kts.tv_nsec, &up->tv_nsec); | |
2497 | } | |
2498 | return err; | |
2499 | } | |
2500 | ||
6b96018b | 2501 | static int dev_ifname32(struct net *net, struct compat_ifreq __user *uifr32) |
7a229387 AB |
2502 | { |
2503 | struct ifreq __user *uifr; | |
2504 | int err; | |
2505 | ||
2506 | uifr = compat_alloc_user_space(sizeof(struct ifreq)); | |
6b96018b | 2507 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2508 | return -EFAULT; |
2509 | ||
6b96018b | 2510 | err = dev_ioctl(net, SIOCGIFNAME, uifr); |
7a229387 AB |
2511 | if (err) |
2512 | return err; | |
2513 | ||
6b96018b | 2514 | if (copy_in_user(uifr32, uifr, sizeof(struct compat_ifreq))) |
7a229387 AB |
2515 | return -EFAULT; |
2516 | ||
2517 | return 0; | |
2518 | } | |
2519 | ||
6b96018b | 2520 | static int dev_ifconf(struct net *net, struct compat_ifconf __user *uifc32) |
7a229387 | 2521 | { |
6b96018b | 2522 | struct compat_ifconf ifc32; |
7a229387 AB |
2523 | struct ifconf ifc; |
2524 | struct ifconf __user *uifc; | |
6b96018b | 2525 | struct compat_ifreq __user *ifr32; |
7a229387 AB |
2526 | struct ifreq __user *ifr; |
2527 | unsigned int i, j; | |
2528 | int err; | |
2529 | ||
6b96018b | 2530 | if (copy_from_user(&ifc32, uifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2531 | return -EFAULT; |
2532 | ||
2533 | if (ifc32.ifcbuf == 0) { | |
2534 | ifc32.ifc_len = 0; | |
2535 | ifc.ifc_len = 0; | |
2536 | ifc.ifc_req = NULL; | |
2537 | uifc = compat_alloc_user_space(sizeof(struct ifconf)); | |
2538 | } else { | |
c6d409cf ED |
2539 | size_t len = ((ifc32.ifc_len / sizeof(struct compat_ifreq)) + 1) * |
2540 | sizeof(struct ifreq); | |
7a229387 AB |
2541 | uifc = compat_alloc_user_space(sizeof(struct ifconf) + len); |
2542 | ifc.ifc_len = len; | |
2543 | ifr = ifc.ifc_req = (void __user *)(uifc + 1); | |
2544 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
c6d409cf | 2545 | for (i = 0; i < ifc32.ifc_len; i += sizeof(struct compat_ifreq)) { |
6b96018b | 2546 | if (copy_in_user(ifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2547 | return -EFAULT; |
2548 | ifr++; | |
2549 | ifr32++; | |
2550 | } | |
2551 | } | |
2552 | if (copy_to_user(uifc, &ifc, sizeof(struct ifconf))) | |
2553 | return -EFAULT; | |
2554 | ||
6b96018b | 2555 | err = dev_ioctl(net, SIOCGIFCONF, uifc); |
7a229387 AB |
2556 | if (err) |
2557 | return err; | |
2558 | ||
2559 | if (copy_from_user(&ifc, uifc, sizeof(struct ifconf))) | |
2560 | return -EFAULT; | |
2561 | ||
2562 | ifr = ifc.ifc_req; | |
2563 | ifr32 = compat_ptr(ifc32.ifcbuf); | |
2564 | for (i = 0, j = 0; | |
c6d409cf ED |
2565 | i + sizeof(struct compat_ifreq) <= ifc32.ifc_len && j < ifc.ifc_len; |
2566 | i += sizeof(struct compat_ifreq), j += sizeof(struct ifreq)) { | |
2567 | if (copy_in_user(ifr32, ifr, sizeof(struct compat_ifreq))) | |
7a229387 AB |
2568 | return -EFAULT; |
2569 | ifr32++; | |
2570 | ifr++; | |
2571 | } | |
2572 | ||
2573 | if (ifc32.ifcbuf == 0) { | |
2574 | /* Translate from 64-bit structure multiple to | |
2575 | * a 32-bit one. | |
2576 | */ | |
2577 | i = ifc.ifc_len; | |
6b96018b | 2578 | i = ((i / sizeof(struct ifreq)) * sizeof(struct compat_ifreq)); |
7a229387 AB |
2579 | ifc32.ifc_len = i; |
2580 | } else { | |
2581 | ifc32.ifc_len = i; | |
2582 | } | |
6b96018b | 2583 | if (copy_to_user(uifc32, &ifc32, sizeof(struct compat_ifconf))) |
7a229387 AB |
2584 | return -EFAULT; |
2585 | ||
2586 | return 0; | |
2587 | } | |
2588 | ||
6b96018b | 2589 | static int ethtool_ioctl(struct net *net, struct compat_ifreq __user *ifr32) |
7a229387 AB |
2590 | { |
2591 | struct ifreq __user *ifr; | |
7a229387 AB |
2592 | u32 data; |
2593 | void __user *datap; | |
2594 | ||
2595 | ifr = compat_alloc_user_space(sizeof(*ifr)); | |
7a229387 AB |
2596 | |
2597 | if (copy_in_user(&ifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2598 | return -EFAULT; | |
2599 | ||
2600 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2601 | return -EFAULT; | |
2602 | ||
2603 | datap = compat_ptr(data); | |
2604 | if (put_user(datap, &ifr->ifr_ifru.ifru_data)) | |
2605 | return -EFAULT; | |
2606 | ||
6b96018b | 2607 | return dev_ioctl(net, SIOCETHTOOL, ifr); |
7a229387 AB |
2608 | } |
2609 | ||
7a50a240 AB |
2610 | static int compat_siocwandev(struct net *net, struct compat_ifreq __user *uifr32) |
2611 | { | |
2612 | void __user *uptr; | |
2613 | compat_uptr_t uptr32; | |
2614 | struct ifreq __user *uifr; | |
2615 | ||
c6d409cf | 2616 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
7a50a240 AB |
2617 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2618 | return -EFAULT; | |
2619 | ||
2620 | if (get_user(uptr32, &uifr32->ifr_settings.ifs_ifsu)) | |
2621 | return -EFAULT; | |
2622 | ||
2623 | uptr = compat_ptr(uptr32); | |
2624 | ||
2625 | if (put_user(uptr, &uifr->ifr_settings.ifs_ifsu.raw_hdlc)) | |
2626 | return -EFAULT; | |
2627 | ||
2628 | return dev_ioctl(net, SIOCWANDEV, uifr); | |
2629 | } | |
2630 | ||
6b96018b AB |
2631 | static int bond_ioctl(struct net *net, unsigned int cmd, |
2632 | struct compat_ifreq __user *ifr32) | |
7a229387 AB |
2633 | { |
2634 | struct ifreq kifr; | |
2635 | struct ifreq __user *uifr; | |
7a229387 AB |
2636 | mm_segment_t old_fs; |
2637 | int err; | |
2638 | u32 data; | |
2639 | void __user *datap; | |
2640 | ||
2641 | switch (cmd) { | |
2642 | case SIOCBONDENSLAVE: | |
2643 | case SIOCBONDRELEASE: | |
2644 | case SIOCBONDSETHWADDR: | |
2645 | case SIOCBONDCHANGEACTIVE: | |
6b96018b | 2646 | if (copy_from_user(&kifr, ifr32, sizeof(struct compat_ifreq))) |
7a229387 AB |
2647 | return -EFAULT; |
2648 | ||
2649 | old_fs = get_fs(); | |
c6d409cf | 2650 | set_fs(KERNEL_DS); |
6b96018b | 2651 | err = dev_ioctl(net, cmd, &kifr); |
c6d409cf | 2652 | set_fs(old_fs); |
7a229387 AB |
2653 | |
2654 | return err; | |
2655 | case SIOCBONDSLAVEINFOQUERY: | |
2656 | case SIOCBONDINFOQUERY: | |
2657 | uifr = compat_alloc_user_space(sizeof(*uifr)); | |
2658 | if (copy_in_user(&uifr->ifr_name, &ifr32->ifr_name, IFNAMSIZ)) | |
2659 | return -EFAULT; | |
2660 | ||
2661 | if (get_user(data, &ifr32->ifr_ifru.ifru_data)) | |
2662 | return -EFAULT; | |
2663 | ||
2664 | datap = compat_ptr(data); | |
2665 | if (put_user(datap, &uifr->ifr_ifru.ifru_data)) | |
2666 | return -EFAULT; | |
2667 | ||
6b96018b | 2668 | return dev_ioctl(net, cmd, uifr); |
7a229387 AB |
2669 | default: |
2670 | return -EINVAL; | |
ccbd6a5a | 2671 | } |
7a229387 AB |
2672 | } |
2673 | ||
6b96018b AB |
2674 | static int siocdevprivate_ioctl(struct net *net, unsigned int cmd, |
2675 | struct compat_ifreq __user *u_ifreq32) | |
7a229387 AB |
2676 | { |
2677 | struct ifreq __user *u_ifreq64; | |
7a229387 AB |
2678 | char tmp_buf[IFNAMSIZ]; |
2679 | void __user *data64; | |
2680 | u32 data32; | |
2681 | ||
2682 | if (copy_from_user(&tmp_buf[0], &(u_ifreq32->ifr_ifrn.ifrn_name[0]), | |
2683 | IFNAMSIZ)) | |
2684 | return -EFAULT; | |
2685 | if (__get_user(data32, &u_ifreq32->ifr_ifru.ifru_data)) | |
2686 | return -EFAULT; | |
2687 | data64 = compat_ptr(data32); | |
2688 | ||
2689 | u_ifreq64 = compat_alloc_user_space(sizeof(*u_ifreq64)); | |
2690 | ||
2691 | /* Don't check these user accesses, just let that get trapped | |
2692 | * in the ioctl handler instead. | |
2693 | */ | |
2694 | if (copy_to_user(&u_ifreq64->ifr_ifrn.ifrn_name[0], &tmp_buf[0], | |
2695 | IFNAMSIZ)) | |
2696 | return -EFAULT; | |
2697 | if (__put_user(data64, &u_ifreq64->ifr_ifru.ifru_data)) | |
2698 | return -EFAULT; | |
2699 | ||
6b96018b | 2700 | return dev_ioctl(net, cmd, u_ifreq64); |
7a229387 AB |
2701 | } |
2702 | ||
6b96018b AB |
2703 | static int dev_ifsioc(struct net *net, struct socket *sock, |
2704 | unsigned int cmd, struct compat_ifreq __user *uifr32) | |
7a229387 | 2705 | { |
a2116ed2 | 2706 | struct ifreq __user *uifr; |
7a229387 AB |
2707 | int err; |
2708 | ||
a2116ed2 AB |
2709 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
2710 | if (copy_in_user(uifr, uifr32, sizeof(*uifr32))) | |
2711 | return -EFAULT; | |
2712 | ||
2713 | err = sock_do_ioctl(net, sock, cmd, (unsigned long)uifr); | |
2714 | ||
7a229387 AB |
2715 | if (!err) { |
2716 | switch (cmd) { | |
2717 | case SIOCGIFFLAGS: | |
2718 | case SIOCGIFMETRIC: | |
2719 | case SIOCGIFMTU: | |
2720 | case SIOCGIFMEM: | |
2721 | case SIOCGIFHWADDR: | |
2722 | case SIOCGIFINDEX: | |
2723 | case SIOCGIFADDR: | |
2724 | case SIOCGIFBRDADDR: | |
2725 | case SIOCGIFDSTADDR: | |
2726 | case SIOCGIFNETMASK: | |
fab2532b | 2727 | case SIOCGIFPFLAGS: |
7a229387 | 2728 | case SIOCGIFTXQLEN: |
fab2532b AB |
2729 | case SIOCGMIIPHY: |
2730 | case SIOCGMIIREG: | |
a2116ed2 | 2731 | if (copy_in_user(uifr32, uifr, sizeof(*uifr32))) |
7a229387 AB |
2732 | err = -EFAULT; |
2733 | break; | |
2734 | } | |
2735 | } | |
2736 | return err; | |
2737 | } | |
2738 | ||
a2116ed2 AB |
2739 | static int compat_sioc_ifmap(struct net *net, unsigned int cmd, |
2740 | struct compat_ifreq __user *uifr32) | |
2741 | { | |
2742 | struct ifreq ifr; | |
2743 | struct compat_ifmap __user *uifmap32; | |
2744 | mm_segment_t old_fs; | |
2745 | int err; | |
2746 | ||
2747 | uifmap32 = &uifr32->ifr_ifru.ifru_map; | |
2748 | err = copy_from_user(&ifr, uifr32, sizeof(ifr.ifr_name)); | |
2749 | err |= __get_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2750 | err |= __get_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2751 | err |= __get_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2752 | err |= __get_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2753 | err |= __get_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2754 | err |= __get_user(ifr.ifr_map.port, &uifmap32->port); | |
2755 | if (err) | |
2756 | return -EFAULT; | |
2757 | ||
2758 | old_fs = get_fs(); | |
c6d409cf | 2759 | set_fs(KERNEL_DS); |
a2116ed2 | 2760 | err = dev_ioctl(net, cmd, (void __user *)&ifr); |
c6d409cf | 2761 | set_fs(old_fs); |
a2116ed2 AB |
2762 | |
2763 | if (cmd == SIOCGIFMAP && !err) { | |
2764 | err = copy_to_user(uifr32, &ifr, sizeof(ifr.ifr_name)); | |
2765 | err |= __put_user(ifr.ifr_map.mem_start, &uifmap32->mem_start); | |
2766 | err |= __put_user(ifr.ifr_map.mem_end, &uifmap32->mem_end); | |
2767 | err |= __put_user(ifr.ifr_map.base_addr, &uifmap32->base_addr); | |
2768 | err |= __put_user(ifr.ifr_map.irq, &uifmap32->irq); | |
2769 | err |= __put_user(ifr.ifr_map.dma, &uifmap32->dma); | |
2770 | err |= __put_user(ifr.ifr_map.port, &uifmap32->port); | |
2771 | if (err) | |
2772 | err = -EFAULT; | |
2773 | } | |
2774 | return err; | |
2775 | } | |
2776 | ||
2777 | static int compat_siocshwtstamp(struct net *net, struct compat_ifreq __user *uifr32) | |
2778 | { | |
2779 | void __user *uptr; | |
2780 | compat_uptr_t uptr32; | |
2781 | struct ifreq __user *uifr; | |
2782 | ||
c6d409cf | 2783 | uifr = compat_alloc_user_space(sizeof(*uifr)); |
a2116ed2 AB |
2784 | if (copy_in_user(uifr, uifr32, sizeof(struct compat_ifreq))) |
2785 | return -EFAULT; | |
2786 | ||
2787 | if (get_user(uptr32, &uifr32->ifr_data)) | |
2788 | return -EFAULT; | |
2789 | ||
2790 | uptr = compat_ptr(uptr32); | |
2791 | ||
2792 | if (put_user(uptr, &uifr->ifr_data)) | |
2793 | return -EFAULT; | |
2794 | ||
2795 | return dev_ioctl(net, SIOCSHWTSTAMP, uifr); | |
2796 | } | |
2797 | ||
7a229387 | 2798 | struct rtentry32 { |
c6d409cf | 2799 | u32 rt_pad1; |
7a229387 AB |
2800 | struct sockaddr rt_dst; /* target address */ |
2801 | struct sockaddr rt_gateway; /* gateway addr (RTF_GATEWAY) */ | |
2802 | struct sockaddr rt_genmask; /* target network mask (IP) */ | |
c6d409cf ED |
2803 | unsigned short rt_flags; |
2804 | short rt_pad2; | |
2805 | u32 rt_pad3; | |
2806 | unsigned char rt_tos; | |
2807 | unsigned char rt_class; | |
2808 | short rt_pad4; | |
2809 | short rt_metric; /* +1 for binary compatibility! */ | |
7a229387 | 2810 | /* char * */ u32 rt_dev; /* forcing the device at add */ |
c6d409cf ED |
2811 | u32 rt_mtu; /* per route MTU/Window */ |
2812 | u32 rt_window; /* Window clamping */ | |
7a229387 AB |
2813 | unsigned short rt_irtt; /* Initial RTT */ |
2814 | }; | |
2815 | ||
2816 | struct in6_rtmsg32 { | |
2817 | struct in6_addr rtmsg_dst; | |
2818 | struct in6_addr rtmsg_src; | |
2819 | struct in6_addr rtmsg_gateway; | |
2820 | u32 rtmsg_type; | |
2821 | u16 rtmsg_dst_len; | |
2822 | u16 rtmsg_src_len; | |
2823 | u32 rtmsg_metric; | |
2824 | u32 rtmsg_info; | |
2825 | u32 rtmsg_flags; | |
2826 | s32 rtmsg_ifindex; | |
2827 | }; | |
2828 | ||
6b96018b AB |
2829 | static int routing_ioctl(struct net *net, struct socket *sock, |
2830 | unsigned int cmd, void __user *argp) | |
7a229387 AB |
2831 | { |
2832 | int ret; | |
2833 | void *r = NULL; | |
2834 | struct in6_rtmsg r6; | |
2835 | struct rtentry r4; | |
2836 | char devname[16]; | |
2837 | u32 rtdev; | |
2838 | mm_segment_t old_fs = get_fs(); | |
2839 | ||
6b96018b AB |
2840 | if (sock && sock->sk && sock->sk->sk_family == AF_INET6) { /* ipv6 */ |
2841 | struct in6_rtmsg32 __user *ur6 = argp; | |
c6d409cf | 2842 | ret = copy_from_user(&r6.rtmsg_dst, &(ur6->rtmsg_dst), |
7a229387 | 2843 | 3 * sizeof(struct in6_addr)); |
c6d409cf ED |
2844 | ret |= __get_user(r6.rtmsg_type, &(ur6->rtmsg_type)); |
2845 | ret |= __get_user(r6.rtmsg_dst_len, &(ur6->rtmsg_dst_len)); | |
2846 | ret |= __get_user(r6.rtmsg_src_len, &(ur6->rtmsg_src_len)); | |
2847 | ret |= __get_user(r6.rtmsg_metric, &(ur6->rtmsg_metric)); | |
2848 | ret |= __get_user(r6.rtmsg_info, &(ur6->rtmsg_info)); | |
2849 | ret |= __get_user(r6.rtmsg_flags, &(ur6->rtmsg_flags)); | |
2850 | ret |= __get_user(r6.rtmsg_ifindex, &(ur6->rtmsg_ifindex)); | |
7a229387 AB |
2851 | |
2852 | r = (void *) &r6; | |
2853 | } else { /* ipv4 */ | |
6b96018b | 2854 | struct rtentry32 __user *ur4 = argp; |
c6d409cf | 2855 | ret = copy_from_user(&r4.rt_dst, &(ur4->rt_dst), |
7a229387 | 2856 | 3 * sizeof(struct sockaddr)); |
c6d409cf ED |
2857 | ret |= __get_user(r4.rt_flags, &(ur4->rt_flags)); |
2858 | ret |= __get_user(r4.rt_metric, &(ur4->rt_metric)); | |
2859 | ret |= __get_user(r4.rt_mtu, &(ur4->rt_mtu)); | |
2860 | ret |= __get_user(r4.rt_window, &(ur4->rt_window)); | |
2861 | ret |= __get_user(r4.rt_irtt, &(ur4->rt_irtt)); | |
2862 | ret |= __get_user(rtdev, &(ur4->rt_dev)); | |
7a229387 | 2863 | if (rtdev) { |
c6d409cf | 2864 | ret |= copy_from_user(devname, compat_ptr(rtdev), 15); |
7a229387 AB |
2865 | r4.rt_dev = devname; devname[15] = 0; |
2866 | } else | |
2867 | r4.rt_dev = NULL; | |
2868 | ||
2869 | r = (void *) &r4; | |
2870 | } | |
2871 | ||
2872 | if (ret) { | |
2873 | ret = -EFAULT; | |
2874 | goto out; | |
2875 | } | |
2876 | ||
c6d409cf | 2877 | set_fs(KERNEL_DS); |
6b96018b | 2878 | ret = sock_do_ioctl(net, sock, cmd, (unsigned long) r); |
c6d409cf | 2879 | set_fs(old_fs); |
7a229387 AB |
2880 | |
2881 | out: | |
7a229387 AB |
2882 | return ret; |
2883 | } | |
2884 | ||
2885 | /* Since old style bridge ioctl's endup using SIOCDEVPRIVATE | |
2886 | * for some operations; this forces use of the newer bridge-utils that | |
2887 | * use compatiable ioctls | |
2888 | */ | |
6b96018b | 2889 | static int old_bridge_ioctl(compat_ulong_t __user *argp) |
7a229387 | 2890 | { |
6b96018b | 2891 | compat_ulong_t tmp; |
7a229387 | 2892 | |
6b96018b | 2893 | if (get_user(tmp, argp)) |
7a229387 AB |
2894 | return -EFAULT; |
2895 | if (tmp == BRCTL_GET_VERSION) | |
2896 | return BRCTL_VERSION + 1; | |
2897 | return -EINVAL; | |
2898 | } | |
2899 | ||
6b96018b AB |
2900 | static int compat_sock_ioctl_trans(struct file *file, struct socket *sock, |
2901 | unsigned int cmd, unsigned long arg) | |
2902 | { | |
2903 | void __user *argp = compat_ptr(arg); | |
2904 | struct sock *sk = sock->sk; | |
2905 | struct net *net = sock_net(sk); | |
7a229387 | 2906 | |
6b96018b AB |
2907 | if (cmd >= SIOCDEVPRIVATE && cmd <= (SIOCDEVPRIVATE + 15)) |
2908 | return siocdevprivate_ioctl(net, cmd, argp); | |
2909 | ||
2910 | switch (cmd) { | |
2911 | case SIOCSIFBR: | |
2912 | case SIOCGIFBR: | |
2913 | return old_bridge_ioctl(argp); | |
2914 | case SIOCGIFNAME: | |
2915 | return dev_ifname32(net, argp); | |
2916 | case SIOCGIFCONF: | |
2917 | return dev_ifconf(net, argp); | |
2918 | case SIOCETHTOOL: | |
2919 | return ethtool_ioctl(net, argp); | |
7a50a240 AB |
2920 | case SIOCWANDEV: |
2921 | return compat_siocwandev(net, argp); | |
a2116ed2 AB |
2922 | case SIOCGIFMAP: |
2923 | case SIOCSIFMAP: | |
2924 | return compat_sioc_ifmap(net, cmd, argp); | |
6b96018b AB |
2925 | case SIOCBONDENSLAVE: |
2926 | case SIOCBONDRELEASE: | |
2927 | case SIOCBONDSETHWADDR: | |
2928 | case SIOCBONDSLAVEINFOQUERY: | |
2929 | case SIOCBONDINFOQUERY: | |
2930 | case SIOCBONDCHANGEACTIVE: | |
2931 | return bond_ioctl(net, cmd, argp); | |
2932 | case SIOCADDRT: | |
2933 | case SIOCDELRT: | |
2934 | return routing_ioctl(net, sock, cmd, argp); | |
2935 | case SIOCGSTAMP: | |
2936 | return do_siocgstamp(net, sock, cmd, argp); | |
2937 | case SIOCGSTAMPNS: | |
2938 | return do_siocgstampns(net, sock, cmd, argp); | |
a2116ed2 AB |
2939 | case SIOCSHWTSTAMP: |
2940 | return compat_siocshwtstamp(net, argp); | |
6b96018b AB |
2941 | |
2942 | case FIOSETOWN: | |
2943 | case SIOCSPGRP: | |
2944 | case FIOGETOWN: | |
2945 | case SIOCGPGRP: | |
2946 | case SIOCBRADDBR: | |
2947 | case SIOCBRDELBR: | |
2948 | case SIOCGIFVLAN: | |
2949 | case SIOCSIFVLAN: | |
2950 | case SIOCADDDLCI: | |
2951 | case SIOCDELDLCI: | |
2952 | return sock_ioctl(file, cmd, arg); | |
2953 | ||
2954 | case SIOCGIFFLAGS: | |
2955 | case SIOCSIFFLAGS: | |
2956 | case SIOCGIFMETRIC: | |
2957 | case SIOCSIFMETRIC: | |
2958 | case SIOCGIFMTU: | |
2959 | case SIOCSIFMTU: | |
2960 | case SIOCGIFMEM: | |
2961 | case SIOCSIFMEM: | |
2962 | case SIOCGIFHWADDR: | |
2963 | case SIOCSIFHWADDR: | |
2964 | case SIOCADDMULTI: | |
2965 | case SIOCDELMULTI: | |
2966 | case SIOCGIFINDEX: | |
6b96018b AB |
2967 | case SIOCGIFADDR: |
2968 | case SIOCSIFADDR: | |
2969 | case SIOCSIFHWBROADCAST: | |
6b96018b | 2970 | case SIOCDIFADDR: |
6b96018b AB |
2971 | case SIOCGIFBRDADDR: |
2972 | case SIOCSIFBRDADDR: | |
2973 | case SIOCGIFDSTADDR: | |
2974 | case SIOCSIFDSTADDR: | |
2975 | case SIOCGIFNETMASK: | |
2976 | case SIOCSIFNETMASK: | |
2977 | case SIOCSIFPFLAGS: | |
2978 | case SIOCGIFPFLAGS: | |
2979 | case SIOCGIFTXQLEN: | |
2980 | case SIOCSIFTXQLEN: | |
2981 | case SIOCBRADDIF: | |
2982 | case SIOCBRDELIF: | |
9177efd3 AB |
2983 | case SIOCSIFNAME: |
2984 | case SIOCGMIIPHY: | |
2985 | case SIOCGMIIREG: | |
2986 | case SIOCSMIIREG: | |
6b96018b | 2987 | return dev_ifsioc(net, sock, cmd, argp); |
9177efd3 | 2988 | |
6b96018b AB |
2989 | case SIOCSARP: |
2990 | case SIOCGARP: | |
2991 | case SIOCDARP: | |
6b96018b | 2992 | case SIOCATMARK: |
9177efd3 AB |
2993 | return sock_do_ioctl(net, sock, cmd, arg); |
2994 | } | |
2995 | ||
2996 | /* Prevent warning from compat_sys_ioctl, these always | |
2997 | * result in -EINVAL in the native case anyway. */ | |
2998 | switch (cmd) { | |
2999 | case SIOCRTMSG: | |
3000 | case SIOCGIFCOUNT: | |
6b96018b AB |
3001 | case SIOCSRARP: |
3002 | case SIOCGRARP: | |
3003 | case SIOCDRARP: | |
9177efd3 AB |
3004 | case SIOCSIFLINK: |
3005 | case SIOCGIFSLAVE: | |
3006 | case SIOCSIFSLAVE: | |
3007 | return -EINVAL; | |
6b96018b AB |
3008 | } |
3009 | ||
3010 | return -ENOIOCTLCMD; | |
3011 | } | |
7a229387 | 3012 | |
89bbfc95 | 3013 | static long compat_sock_ioctl(struct file *file, unsigned cmd, |
89bddce5 | 3014 | unsigned long arg) |
89bbfc95 SP |
3015 | { |
3016 | struct socket *sock = file->private_data; | |
3017 | int ret = -ENOIOCTLCMD; | |
87de87d5 DM |
3018 | struct sock *sk; |
3019 | struct net *net; | |
3020 | ||
3021 | sk = sock->sk; | |
3022 | net = sock_net(sk); | |
89bbfc95 SP |
3023 | |
3024 | if (sock->ops->compat_ioctl) | |
3025 | ret = sock->ops->compat_ioctl(sock, cmd, arg); | |
3026 | ||
87de87d5 DM |
3027 | if (ret == -ENOIOCTLCMD && |
3028 | (cmd >= SIOCIWFIRST && cmd <= SIOCIWLAST)) | |
3029 | ret = compat_wext_handle_ioctl(net, cmd, arg); | |
3030 | ||
6b96018b AB |
3031 | if (ret == -ENOIOCTLCMD) |
3032 | ret = compat_sock_ioctl_trans(file, sock, cmd, arg); | |
3033 | ||
89bbfc95 SP |
3034 | return ret; |
3035 | } | |
3036 | #endif | |
3037 | ||
ac5a488e SS |
3038 | int kernel_bind(struct socket *sock, struct sockaddr *addr, int addrlen) |
3039 | { | |
3040 | return sock->ops->bind(sock, addr, addrlen); | |
3041 | } | |
c6d409cf | 3042 | EXPORT_SYMBOL(kernel_bind); |
ac5a488e SS |
3043 | |
3044 | int kernel_listen(struct socket *sock, int backlog) | |
3045 | { | |
3046 | return sock->ops->listen(sock, backlog); | |
3047 | } | |
c6d409cf | 3048 | EXPORT_SYMBOL(kernel_listen); |
ac5a488e SS |
3049 | |
3050 | int kernel_accept(struct socket *sock, struct socket **newsock, int flags) | |
3051 | { | |
3052 | struct sock *sk = sock->sk; | |
3053 | int err; | |
3054 | ||
3055 | err = sock_create_lite(sk->sk_family, sk->sk_type, sk->sk_protocol, | |
3056 | newsock); | |
3057 | if (err < 0) | |
3058 | goto done; | |
3059 | ||
3060 | err = sock->ops->accept(sock, *newsock, flags); | |
3061 | if (err < 0) { | |
3062 | sock_release(*newsock); | |
fa8705b0 | 3063 | *newsock = NULL; |
ac5a488e SS |
3064 | goto done; |
3065 | } | |
3066 | ||
3067 | (*newsock)->ops = sock->ops; | |
1b08534e | 3068 | __module_get((*newsock)->ops->owner); |
ac5a488e SS |
3069 | |
3070 | done: | |
3071 | return err; | |
3072 | } | |
c6d409cf | 3073 | EXPORT_SYMBOL(kernel_accept); |
ac5a488e SS |
3074 | |
3075 | int kernel_connect(struct socket *sock, struct sockaddr *addr, int addrlen, | |
4768fbcb | 3076 | int flags) |
ac5a488e SS |
3077 | { |
3078 | return sock->ops->connect(sock, addr, addrlen, flags); | |
3079 | } | |
c6d409cf | 3080 | EXPORT_SYMBOL(kernel_connect); |
ac5a488e SS |
3081 | |
3082 | int kernel_getsockname(struct socket *sock, struct sockaddr *addr, | |
3083 | int *addrlen) | |
3084 | { | |
3085 | return sock->ops->getname(sock, addr, addrlen, 0); | |
3086 | } | |
c6d409cf | 3087 | EXPORT_SYMBOL(kernel_getsockname); |
ac5a488e SS |
3088 | |
3089 | int kernel_getpeername(struct socket *sock, struct sockaddr *addr, | |
3090 | int *addrlen) | |
3091 | { | |
3092 | return sock->ops->getname(sock, addr, addrlen, 1); | |
3093 | } | |
c6d409cf | 3094 | EXPORT_SYMBOL(kernel_getpeername); |
ac5a488e SS |
3095 | |
3096 | int kernel_getsockopt(struct socket *sock, int level, int optname, | |
3097 | char *optval, int *optlen) | |
3098 | { | |
3099 | mm_segment_t oldfs = get_fs(); | |
fb8621bb NK |
3100 | char __user *uoptval; |
3101 | int __user *uoptlen; | |
ac5a488e SS |
3102 | int err; |
3103 | ||
fb8621bb NK |
3104 | uoptval = (char __user __force *) optval; |
3105 | uoptlen = (int __user __force *) optlen; | |
3106 | ||
ac5a488e SS |
3107 | set_fs(KERNEL_DS); |
3108 | if (level == SOL_SOCKET) | |
fb8621bb | 3109 | err = sock_getsockopt(sock, level, optname, uoptval, uoptlen); |
ac5a488e | 3110 | else |
fb8621bb NK |
3111 | err = sock->ops->getsockopt(sock, level, optname, uoptval, |
3112 | uoptlen); | |
ac5a488e SS |
3113 | set_fs(oldfs); |
3114 | return err; | |
3115 | } | |
c6d409cf | 3116 | EXPORT_SYMBOL(kernel_getsockopt); |
ac5a488e SS |
3117 | |
3118 | int kernel_setsockopt(struct socket *sock, int level, int optname, | |
b7058842 | 3119 | char *optval, unsigned int optlen) |
ac5a488e SS |
3120 | { |
3121 | mm_segment_t oldfs = get_fs(); | |
fb8621bb | 3122 | char __user *uoptval; |
ac5a488e SS |
3123 | int err; |
3124 | ||
fb8621bb NK |
3125 | uoptval = (char __user __force *) optval; |
3126 | ||
ac5a488e SS |
3127 | set_fs(KERNEL_DS); |
3128 | if (level == SOL_SOCKET) | |
fb8621bb | 3129 | err = sock_setsockopt(sock, level, optname, uoptval, optlen); |
ac5a488e | 3130 | else |
fb8621bb | 3131 | err = sock->ops->setsockopt(sock, level, optname, uoptval, |
ac5a488e SS |
3132 | optlen); |
3133 | set_fs(oldfs); | |
3134 | return err; | |
3135 | } | |
c6d409cf | 3136 | EXPORT_SYMBOL(kernel_setsockopt); |
ac5a488e SS |
3137 | |
3138 | int kernel_sendpage(struct socket *sock, struct page *page, int offset, | |
3139 | size_t size, int flags) | |
3140 | { | |
f8451725 HX |
3141 | sock_update_classid(sock->sk); |
3142 | ||
ac5a488e SS |
3143 | if (sock->ops->sendpage) |
3144 | return sock->ops->sendpage(sock, page, offset, size, flags); | |
3145 | ||
3146 | return sock_no_sendpage(sock, page, offset, size, flags); | |
3147 | } | |
c6d409cf | 3148 | EXPORT_SYMBOL(kernel_sendpage); |
ac5a488e SS |
3149 | |
3150 | int kernel_sock_ioctl(struct socket *sock, int cmd, unsigned long arg) | |
3151 | { | |
3152 | mm_segment_t oldfs = get_fs(); | |
3153 | int err; | |
3154 | ||
3155 | set_fs(KERNEL_DS); | |
3156 | err = sock->ops->ioctl(sock, cmd, arg); | |
3157 | set_fs(oldfs); | |
3158 | ||
3159 | return err; | |
3160 | } | |
c6d409cf | 3161 | EXPORT_SYMBOL(kernel_sock_ioctl); |
ac5a488e | 3162 | |
91cf45f0 TM |
3163 | int kernel_sock_shutdown(struct socket *sock, enum sock_shutdown_cmd how) |
3164 | { | |
3165 | return sock->ops->shutdown(sock, how); | |
3166 | } | |
91cf45f0 | 3167 | EXPORT_SYMBOL(kernel_sock_shutdown); |